The invention relates to a position line drawing device, in particular to a device for assisting in drawing a position line for shoemaking. The technical problems that a device for assisting in drawing a position line for shoemaking is large in labor capacity, low in accuracy and complex in operation need to be solved. In order to solve the above-mentioned technical problems, the device for assisting in drawing the position line for shoemaking is provided. The device comprises a placing table, an assisting plate, connecting rods, a guide plate, fixed stop dogs, a chuck, an electric push rod, a motor, a left bearing pedestal, a nut, a lead screw, a fixed plate, a right bearing pedestal, a rotating shaft, a rack, a gear, a sliding block and a sliding rail, the fixed plate is arranged above the placing table, and the bottom of the fixed plate is provided with the motor, the left bearing pedestal and the right bearing pedestal in sequence from left to right. According to the device for assisting in drawing the position line for shoemaking, the effects of being small in labor capacity, high in accuracy and easy to operate are achieved, a smooth and horizontal straight line can be well drawn, and the device can rapidly move up and down to reduce the operation time.