diff --git a/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx b/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx
index 2a6cb226..dc85d1c6 100644
--- a/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx
+++ b/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx
@@ -49,7 +49,16 @@ export default function PassivityCircuitAllocation(props) {
         obj.on('mousedown', (e) => handleTargetModules(obj))
       })
 
+    // [CIRCUIT-BOX-SELECT 2026-06-10] 手動回路割り当て 에서만 드래그 박스 복수선택 활성화 (이 화면 한정)
+    const prevSelection = canvas.selection
+    canvas.selection = true
+    canvas.on('selection:created', handleBoxSelect)
+    canvas.on('selection:updated', handleBoxSelect)
+
     return () => {
+      canvas.off('selection:created', handleBoxSelect)
+      canvas.off('selection:updated', handleBoxSelect)
+      canvas.selection = prevSelection
       canvas
         .getObjects()
         .filter((obj) => obj.name === POLYGON_TYPE.MODULE)
@@ -57,6 +66,7 @@ export default function PassivityCircuitAllocation(props) {
           obj.set({ strokeWidth: 0.3 })
           obj.off('mousedown')
         })
+      canvas.discardActiveObject()
       canvas.renderAll()
     }
   }, [])
@@ -84,6 +94,28 @@ export default function PassivityCircuitAllocation(props) {
     canvas.renderAll()
   }
 
+  // [CIRCUIT-BOX-SELECT 2026-06-10] 드래그 박스(activeSelection) 로 잡힌 모듈을 targetModules 에 가산 병합 후 fabric 선택 해제
+  const handleBoxSelect = () => {
+    const active = canvas.getActiveObject()
+    if (!active || active.type !== 'activeSelection') return
+    const boxModules = active.getObjects().filter((obj) => obj.name === POLYGON_TYPE.MODULE)
+    if (boxModules.length === 0) return
+
+    setTargetModules((prev) => {
+      const next = Array.isArray(prev) ? [...prev] : []
+      boxModules.forEach((obj) => {
+        if (!next.includes(obj.id)) {
+          obj.set({ strokeWidth: 2 })
+          next.push(obj.id)
+        }
+      })
+      return next
+    })
+
+    canvas.discardActiveObject()
+    canvas.renderAll()
+  }
+
   const handleCircuitNumberFix = () => {
     const pcsTpCd = selectedPcs.pcsTpCd // 실내집중형, 옥외멀티형
     let uniqueCircuitNumbers = [