The present invention discloses a stirrer used for cake processing. The stirrer includes a base; a machine head is fixed on the base through a support column; a motor is arranged in the machine head;the output end of the motor extends into a gear disc and is provided with a driving gear; a driven gear is arranged in the gear disc; a fixed block is integrally arranged at the center of the bottom of the driven gear; the fixed block is provided with a stirring shaft through threads; a fixing plate is movably arranged at one side of the support column; a supporting frame is welded on one side ofthe fixing plate; the other side of the fixing plate is fixedly connected to a thread insert through a connecting plate; the thread insert is connected to a screw rod through threads; and both ends ofthe screw rod are rotationally connected to the support column. According to the invention, a rotating wheel rotates to adjust the height of a storage container and further to change the stirring depth; and spiral blades convey the bottom layer of a cake liquid to the upper layer so as to avoid cake liquid deposition, to ensure the balance of the cake liquid quality, and to improve the mixing effect.