The invention discloses a lifting mechanism for manufacturing silicon base solar cells. The lifting mechanism comprises a cylinder barrel with one opened end, and a cylinder cover connected with the opened end by a bolt; a first oil pipe and a second oil pipe are arranged on the side surface of the cylinder barrel; a piston and a guide sleeve are arranged in the cylinder barrel; a piston rod is fixed in the piston; one end, towards the cylinder cover, of the piston rod movably penetrates through the guide sleeve and the cylinder cover, and is connected with an output head by a bolt; annular piston pads are respectively arranged at two ends of the piston; the outer diameters of the annular piston pads are equal to the inner diameter of the cylinder barrel; and the inner diameters of the annular piston pads are gradually increased along the piston to two ends of the cylinder barrel. The lifting mechanism is provided with the annular piston pads; and in a low-temperature environment, even if hydraulic oil generates the phenomenon of slow flowing speed and part solidification to cause low acting force on the piston, a hydraulic oil pump can be allowed to enable the lifting mechanism to normally work under the preconditions of not increasing excessive power consumption and supplying higher output pressure.