Screen printing positioning and clamping device

The utility model discloses a silk-screen printing positioning and clamping device, which belongs to the technical field of silk-screen printing, and comprises a shell and two sliding blocks, a bidirectional screw rod and a positive and negative rotation motor are arranged in the shell, and an output shaft of the positive and negative rotation motor is connected with the bidirectional screw rod with a driven gear through a coupler. A driving gear is fixed to an output shaft of the forward and reverse rotation motor, a through groove allowing the sliding blocks to slide is formed in one side of the shell, one end of the bidirectional lead screw penetrates through the two sliding blocks and is rotationally connected with the shell, through grooves matched with the protruding blocks are formed in the two sliding blocks, and clamping blocks are fixed to the opposite side walls of the two protruding blocks. And non-slip mats are fixed to the opposite side walls of the two clamping blocks correspondingly, through h