Soybean milk machine with locking pressure control

A soybean milk machine with locking pressure control comprises a main machine, a cover body, a circular fastening plate, a driving rod, a lock catch assembly, a pressure sensor, a pressure limiting valve, a sub-data connector and a mother data connector, the main machine comprises a shell, a cup body, an electric heating disc, a seat frame, a motor and a knife assembly, the cover body comprises a cover top plate and a barrel-shaped body part, and a radial groove is formed in the cover top plate; the driving rod comprises a sub joint cavity, a locking plate and a hinge driving cavity; the lock catch assembly and the female data connector are arranged in the function cavity, the hinge driving cavity is hinged to the radial groove, the circular fastening plate drives the cylindrical body part to be locked with the cup body, a shaft body of the driven rod is in sliding fit with the driving plate, and the driven rod is in sliding fit with the sliding hole. The pressure sensor is arranged on the circular fastening