The invention discloses a 10kV three-phase synchronous fall-off fusing switch three fusing mechanisms and an insulated connecting rod for connecting the three fusing mechanisms. Each fusing mechanismcomprises a porcelain vase, an installation assembly, an inlet wire terminal an outlet wire terminal, an upper static contact assembly, a lower static contact assembly, an upper moving contact assembly, a lower moving contact assembly, a fuse tube, a fuse, an opening/closing support, an opening/closing handle and an arc extinguishing tube. The switch is characterized in that a plug box fixing pinof the lower moving contact assembly rotates to a horizontal or vertical state to drive the lower moving contact assembly, the fuse tube and the upper moving contact assembly integrated with the plugbox fixing pin to move upwards or downwards together, the upper moving contact assembly is cooperated by compression with the upper static contact assembly or disconnected from the upper static contact assembly, and the fusing mechanisms are opened/closed under linkage of the insulated connecting rod. The switch has the advantages of simple structure, convenient operation, more stable contact between the upper and lower moving/static contacts, and capable of avoiding problem of arc short circuit.