The invention discloses an automatic pastry rolling machine. A lead screw is vertically arranged in a shell; the bottom of the lead screw and the top of a bearing junction extend out of the top of the shell and is connected with a lever; the other end of the lever is connected with a working head; a worm gear is fixedly connected to a position where the lead screw is positioned in the middle of the shell by a lead screw nut; a gap is formed in a corresponding position of the middle part of the shell; a motor power system is mounted outside the shell; a worm screw in the motor power system is meshed with the worm gear positioned on the lead screw at the gap of the shell; a transverse probe rod is mounted on the rod body of the working head; the front end of the probe rod is processed with threaded holes from top to bottom; a vertical section of an L-shaped oil pipe is connected with the threaded holes by threads; an upper part and a lower part of the L-shaped oil pipe are connected by the threads in a fastened manner; a transverse section of the oil pipe is connected with an oil brush and is positioned at the bottom of the working head; the interior of the oil pipe is of a hollow structure. The automatic pastry rolling machine has the advantages that the operation is simple and convenient, the efficiency is high, and the machine is safe and sanitary, and is convenient to clean.