The utility model provides an even feeding system of circuit board breaker, include the breaker, at the uniform velocity conveyer, take tooth rotary drum and variable speed to pass on the belt, take the tooth rotary drum to include rotary drum and drag arm, it is a set of at least the drag arm warp direction sets up rotary drum week is inclined, the rotary drum sets up variable speed conveyer beltdischarge end, the rotary drum with at the uniform velocity the conveyer belt feed end is corresponding, at the uniform velocity the conveyer belt the discharge end with the breaker is corresponding,compares with prior art, the utility model discloses a pass through the rotational speed restriction of rotary drum with the material loading process, the possible circuit board that prevents is piled up in that the breaker is inside, and simultaneously through the control of variable speed conveyer belt to material loading speed, the control of the unloading speed of different circuit boards onsame platform breaker is perfectd to the speed of control unloading.