Automatic adjusting mechanism for silk screen plate

The automatic adjusting mechanism comprises a first sliding plate and a second sliding plate which are installed on a printing machine rack in a sliding mode, a silk screen frame used for containing a silk screen plate is arranged between the first sliding plate and the second sliding plate, lap joint plates are arranged on the two sides of the silk screen frame, and the lap joint plates are in lap joint with the first sliding plate and the second sliding plate correspondingly. A longitudinal adjusting assembly is arranged on the first sliding plate and comprises a longitudinal fixing plate fixed to the side wall of the first sliding plate, a longitudinal servo motor, a longitudinal speed reducer, an inner screw connected to an output shaft of the longitudinal speed reducer and an outer sliding sleeve connected with the lap joint plate, and the longitudinal servo motor and the longitudinal speed reducer are installed on the longitudinal fixing plate. The inner screw rod is in threaded fit with the outer slidi