The invention discloses a circulation differential stirring type semen trichosanthis extracting device with straight-plate propellers for loosening spiral rubbing and squeezing. The circulation differential stirring type semen trichosanthis extracting device is characterized in that a discharge end of a loosening drum is connected with a differential-speed roll, a discharge end of the differential-speed roll is connected with a coarse drum sieve, sieve pores of the coarse drum sieve are connected with a pulp distributing rubbing and squeezing drum sieve, and a discharge end of the coarse drum sieve is connected with a pericarpium trichosanthis and fructus trichosanthis flesh tank; a sieve tube of the pulp distributing rubbing and squeezing drum sieve is provided with spiral convex strips and are configured with propeller shafts with straight plates, the sieve tube and the propeller shafts with the straight plates can rotate in the same directions or reverse directions, and a discharge end of the pulp distributing rubbing and squeezing drum sieve is connected with a washing tank; a stirring device which comprises a stirring shaft, high-position stirring propellers and low-position stirring propellers is arranged in the washing tank, and the stirring shaft can be driven by a packaged tubular differential magnetic coupling; the washing tank is connected with a stirring pump by a suction pipe, and the stirring pump is connected with a bottom pipe of the washing tank in parallel. The circulation differential stirring type semen trichosanthis extracting device has the advantages that systems are continuous and smooth and are high in practicality, and accordingly efficient production can be facilitated; a sinusoidal differential coupling and the packaged tubular differential magnetic coupling have distinct characteristics, and perfect technical effects which are difficult to foresee by technicians in the field can be realized by the sinusoidal differential coupling and the packaged tubular differential magnetic coupling.