The utility model relates to a lithography apparatus field discloses a silk screen printing machine base, including frame and base body, base body's top is provided with the silk screen printing body,the last barrel that is provided with of base body, it is provided with showy board to slide in the barrel, it forms the liquid chamber to float between board and the base body, it is hollow structure to float the board, it is connected with a plurality of hollow tubes to float the board upside, the hollow tube communicates with the cavity of showy board, it has the exhaust tube still to communicate in the hollow structure of showy board, exhaust tube and barrel sliding connection, one side of base body is provided with the piston cylinder, the intercommunication has communicating pipe between piston cylinder and the liquid chamber, sliding connection has the piston board in the piston cylinder, be connected with the piston rod on the piston board, the one end that the piston board was kept away from to the piston rod is connected with the connecting rod, the connecting rod is kept away from the one end of piston rod and is connected on the silk screen printing body, still be providedwith glass piece rotary mechanism on the connecting rod, this patent is compared with prior art, can protect the glass piece not receive the damage when the silk screen printing, and the operation issafer.