Water environment micro-plastic treatment system and micro-plastic treatment method

The invention discloses a water environment micro-plastic treatment system which comprises a water inlet pipe, and the water inlet pipe is connected with an inertia gathering and shunting device through a first pressure stabilizing valve; the inertia gathering and shunting device comprises a straight pipe connected with the water inlet pipe, and an annular sleeve is arranged in the front part of the straight pipe; the annular sleeve comprises an outer pipe and an inner pipe, the inner pipe is connected with a water outlet pump through a first water pipe, and the first water pipe upstream of the water outlet pump is serially connected with a filtering adsorption unit; an inlet of the water outlet pump is connected with a discharge pipe, and a discharge valve is arranged on the discharge pipe; a receiving container is arranged below the front end of the outer pipe and selectively communicated with the first membrane separation device or the second membrane separation device through a first two-position three-wa