An automatic refrigerating compressor motor protector assembling device with a plug-in sheet pressing and fixing function comprises a
workbench, a rotary disc, a rotary disc driving mechanism, a retained workpiece detecting and sensing mechanism, a
rivet installing mechanism, a protector base fetching and releasing mechanism, a workpiece omission detecting and sensing mechanism, a static contact installing mechanism, a
rivet spinning and riveting mechanism, a movable contact fetching and releasing mechanism, a movable contact prepressing mechanism, a movable contact hold-down mechanism, a plug-in sheet fetching and releasing mechanism and a protector removing mechanism. The automatic refrigerating compressor motor protector assembling device is characterized by further comprising a plug-in sheet pressing and fixing mechanism which is located between the plug-in sheet fetching and releasing mechanism and the protector removing mechanism, the plug-in sheet pressing and fixing mechanism comprises a plug-in sheet pressure foot air cylinder, a plug-in sheet pressure foot air cylinder seat, plug-in sheet pressure foot air cylinder seat supporting stand columns, a plug-in sheet pressure foot air cylinder seat bearing plate, a plug-in sheet pressure foot air cylinder and column connecting seat, a plug-in sheet pressure foot air cylinder and column connecting seat sliding block, plug-in sheet pressure foot seats and plug-in
pressure feet. By the adoption of the automatic refrigerating compressor motor protector assembling device, the situation that plug-in sheets are loose and even are disengaged from a protector base in the using process is avoided.