The invention discloses a spiral stirrup winding synchronizing device for an engineering reinforcement cage of a modern assembly type building. The spiral stirrup winding synchronizing device comprises a linear slide device and a synchronous lead screw which are arranged in parallel, wherein a drive roller is mounted on the linear slide device; a driven nut sleeves the synchronous lead screw in a threaded mode; a synchronous rotary part is arranged between the drive roller and the driven nut; and a synchronous slide holder is arranged between the drive roller and the driven nut. According to the spiral stirrup winding synchronizing device for the engineering reinforcement cage of the modern assembly type building disclosed by the invention, when a stirrup is wound on a barrel body, the drive roller linearly moves along the linear slide device while rotating, so that the stirrup moves in the linear direction while wound to obtain a plurality of rings of spiral bars, and therefore, follow-up cutting is convenient; and according to the scheme, spiral reinforcement can be directly obtained through autorotation of winding the barrel body.