Soybean protein twin-screw extruder and extrusion method

The invention relates to the field of soybean protein processing, in particular to a soybean protein twin-screw extruder which comprises a machine base and a charging barrel arranged on the machine base, a hopper is installed at the upper end of the charging barrel, a twin-screw extrusion assembly is arranged in the charging barrel, the twin-screw extrusion assembly comprises two installation shafts rotationally connected to the interior of the charging barrel, and the two installation shafts are arranged on the machine base. And screw rods are fixed to the side walls, located in the charging barrel, of the two mounting shafts, and a power box is fixed to the machine base. According to the soybean protein double-screw extruder, in the soybean protein processing process through the double-screw extruder, through mutual cooperation of the pressure supply assembly, the driving assembly and the control assembly, the internal pressure of the charging barrel does not continue to be increased after being increased t