diff --git a/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePart.java b/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePart.java
new file mode 100644
index 0000000..60f9cdb
--- /dev/null
+++ b/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePart.java
@@ -0,0 +1,83 @@
+package com.ether.pms.mdm.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "ops_spare_part")
+@Data
+public class SparePart {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+
+    @Column(name = "project_id", nullable = false)
+    private UUID projectId;
+
+    @Column(name = "spare_part_code", nullable = false, unique = true)
+    private String sparePartCode;
+
+    @Column(name = "spare_part_name", nullable = false)
+    private String sparePartName;
+
+    @Column(name = "category_id")
+    private UUID categoryId;
+
+    @Column
+    private String specification;
+
+    @Column(nullable = false)
+    private String unit;
+
+    @Column(name = "safe_stock")
+    private Integer safeStock;
+
+    @Column(name = "current_stock")
+    private Integer currentStock;
+
+    @Column(name = "unit_price", precision = 10, scale = 2)
+    private BigDecimal unitPrice;
+
+    @Column
+    private String supplier;
+
+    @Column(name = "supplier_contact")
+    private String supplierContact;
+
+    @Column
+    private String location;
+
+    @Column
+    private String remarks;
+
+    @Column(nullable = false)
+    @Enumerated(EnumType.STRING)
+    private Status status = Status.ACTIVE;
+
+    public enum Status {
+        ACTIVE, INACTIVE
+    }
+
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    public void prePersist() {
+        createdAt = LocalDateTime.now();
+        updatedAt = LocalDateTime.now();
+        if (currentStock == null) currentStock = 0;
+        if (safeStock == null) safeStock = 0;
+    }
+
+    @PreUpdate
+    public void preUpdate() {
+        updatedAt = LocalDateTime.now();
+    }
+}
\ No newline at end of file
diff --git a/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePartCategory.java b/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePartCategory.java
new file mode 100644
index 0000000..acb8d2d
--- /dev/null
+++ b/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePartCategory.java
@@ -0,0 +1,39 @@
+package com.ether.pms.mdm.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "ops_spare_part_category")
+@Data
+public class SparePartCategory {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+
+    @Column(name = "parent_id")
+    private UUID parentId;
+
+    @Column(name = "category_code", nullable = false, unique = true)
+    private String categoryCode;
+
+    @Column(name = "category_name", nullable = false)
+    private String categoryName;
+
+    @Column
+    private String description;
+
+    @Column(name = "sort_order")
+    private Integer sortOrder;
+
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+
+    @PrePersist
+    public void prePersist() {
+        createdAt = LocalDateTime.now();
+    }
+}
\ No newline at end of file
diff --git a/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePartRecord.java b/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePartRecord.java
new file mode 100644
index 0000000..d10c0ee
--- /dev/null
+++ b/module-mdm/src/main/java/com/ether/pms/mdm/entity/SparePartRecord.java
@@ -0,0 +1,62 @@
+package com.ether.pms.mdm.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "ops_spare_part_record")
+@Data
+public class SparePartRecord {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+
+    @Column(name = "record_code", nullable = false, unique = true)
+    private String recordCode;
+
+    @Column(name = "record_type", nullable = false)
+    @Enumerated(EnumType.STRING)
+    private RecordType recordType;
+
+    public enum RecordType {
+        IN("入库"),
+        OUT("出库"),
+        CHECK("盘点"),
+        ADJUST("调整");
+
+        private final String desc;
+        RecordType(String desc) { this.desc = desc; }
+        public String getDesc() { return desc; }
+    }
+
+    @Column(name = "spare_part_id", nullable = false)
+    private UUID sparePartId;
+
+    @Column(nullable = false)
+    private Integer quantity;
+
+    @Column(nullable = false)
+    private Integer balance;
+
+    @Column(name = "related_order_id")
+    private UUID relatedOrderId;
+
+    @Column(name = "recorded_by")
+    private UUID recordedBy;
+
+    @Column(name = "record_date")
+    private LocalDateTime recordDate;
+
+    @Column
+    private String remarks;
+
+    @PrePersist
+    public void prePersist() {
+        if (recordDate == null) {
+            recordDate = LocalDateTime.now();
+        }
+    }
+}
\ No newline at end of file