Disclosed is a screw extrusion juicer, comprising a base (1) provided with an electric motor, a juicing cavity (2) mounted on the base (1), and a screw (3) placed in the juicing cavity (2), wherein the juicing cavity (2) comprises a juicing cavity body (25), the juicing cavity body (25) is provided with a juice outlet (21) and a residue outlet (22), the juicing cavity (2) is provided with a feeding port (23) and a feeding channel (24) connected to the feeding port (23), the feeding channel (24) comprises an upper port (241) and a lower port (242) connected to the feeding port (23), a rotatable overturn storage table (4) is movably arranged at the upper port (241), the rotating center of the overturn storage table (4) transversely penetrates the upper port (241), and the overturn storage table (4) is used to place a material (6) and can rotate around the rotating center in either direction. In this way, continuous juicing is achieved, safety in use is also guaranteed, and accidental injury to a user is prevented; meanwhile, fruits and vegetables are not required to be pretreated, thereby reducing user operations, and prolonging service life of the machine.