Multi-degree-of-freedom surgical instrument assisting endoscopic surgery robot system

The utility model belongs to the technical field of medical instruments, and discloses a multi-degree-of-freedom surgical instrument for assisting an endoscopic surgery robot system, which comprises a shell component, a snake bone component, an execution component and a locking component, the shell assembly comprises a base body extending in the first direction and an operation handle. The snake bone assembly is connected with the far end of the base body, and the snake bone assembly can be bent and deflect in the second direction and/or deflect in the third direction; an actuator of the execution assembly has an initial state and an execution state, and a first operation line can slide in a reciprocating mode in the first direction so that the actuator can be switched between the initial state and the execution state. A ratchet wheel of the ratchet mechanism is rotatably connected with the operating handle to enable the first operating wire to slide, the ratchet mechanism can lock the first operating wire, a