The invention discloses a boiler synchronous lifting ash removing mechanism which comprises an ash removing frame and a lifting driving mechanism for driving the ash removing frame to do reciprocatedvertical lifting, the lifting driving mechanism comprises four driving chains moving synchronously and four driving chain wheels in transmission connection with the driving chains evwey two driving chain wheels are connected with a commutator through a driving shaft, the other end of each driving shaft is connected with a bottom-provided bearing, each commutator is connected with a coupler througha transmission shaft, and the couplers are connected with one motor reducing gear; one end of each driving chain is connected to a cleaning frame to form a whole with the cleaning frame, and the driving chains and the cleaning frame move synchronously; and the boiler synchronous lifting ash removing mechanism further comprises an ash blowing device arranged at the top of a boiler, and the air blowing device is used for automatically opening an air inlet valve when the ash removing frame reaches the top of the boiler to conduct impulse type lowing on steel brushes on the ash removing frame. Bymeans of the boiler synchronous lifting ash removing mechanism, normal and stable running of an ash removing device can be guarantee.