The present invention discloses a permanent magnet circuit breaker transmission mechanism. The permanent magnet circuit breaker transmission mechanism comprises: a circuit breaker frame; a permanent magnet mechanism fixed in the circuit breaker frame; a main shaft supported by the circuit breaker frame and driven by the output shaft of the permanent magnet mechanism to rotate, wherein the main shaft is equipped with A, B, C three-phase arms which are respectively connected with A, B, C three-phase insulated pull rods; an auxiliary shaft supported by the circuit breaker frame, wherein the auxiliary shaft is arranged in parallel to the main shaft and interacted with the main shaft in a synchronous rotation manner; and a handle which is fixed to the auxiliary shaft and operable to drive the auxiliary shaft to rotate. According to the permanent magnet circuit breaker transmission mechanism provided by the present invention, the auxiliary shaft can be driven to rotate by operating the handle on the auxiliary shaft, and further the main shaft is driven to rotate to realize the manual closing function; and the handle is arranged on the auxiliary shaft and is far from the rotation axis ofthe main shaft, so that the effort is saved under the same quantity of the rotational torque.