Automatic clamping and positioning mechanism

The utility model provides an automatic clamping and positioning mechanism which comprises a material table, an electric guide rail is installed on one side of the material table, an electric sliding block is installed on the electric guide rail in a sliding mode, an installation block is installed on one side of the electric sliding block, a groove is formed in the installation block, an air pressure rod is installed in the groove, an installation strip is installed at the upper end of the air pressure rod, and a fixing strip is arranged on the other side of the installation strip. A plurality of electric push rods are connected between the mounting strip and the fixing strip; a left sliding groove and a right sliding groove are formed in the side, away from the mounting strip, of the fixing strip, a threaded rod is rotationally mounted in each sliding groove, a movable sliding block is in threaded connection with each threaded rod, and a fixing clamping plate located outside the fixing strip is arranged on