Charging tray positioning mechanism and automatic charging machine

The utility model relates to the technical field of automatic charging machines, in particular to a charging tray positioning mechanism and an automatic charging machine, the automatic charging machine is used for positioning a charging tray and comprises a positioning frame, a positioning assembly, a blocking assembly and a limiting assembly, the positioning frame is provided with a limiting channel for the charging tray to enter, and the positioning assembly is installed on one side of the positioning frame. The blocking assembly and the limiting assembly are movably arranged in the limiting channel in a penetrating mode and used for making contact with the material disc, the blocking assembly is arranged at one end of the positioning frame along the limiting channel, and the limiting assembly is arranged at the other end of the positioning frame along the limiting channel. According to the charging tray positioning mechanism, the mode that the stopping assembly stops the charging tray from being separated