The purpose of the drip irrigation water flow sediment separation system is to improve the efficiency of sediment separation for rivers with a large amount of sediment. The water inlet of the shunt pipe is installed on the water shunt pipe obliquely relative to the water inlet flow direction respectively, and from the shunt pipe closest to the water inlet pipe, the cross-sectional area of the water inlet is 1 / 4 of the cross-sectional area of the water shunt pipe (35), The cross-sectional area of the second branch pipe (a2) water inlet is 2 / 4 of the cross-sectional area of the water pipe (35), and the cross-sectional area of the third branch pipe (a3) water inlet is 2 / 4 of the cross-sectional area of the water pipe (35). 3 / 4, the cross-sectional area of the water inlet of the fourth shunt pipe (a4) is 4 / 4 of the cross-sectional area of the water shunt pipe (35), and the water outlet of each shunt pipe is respectively installed in a cyclone centrifugal separator (32, 30, 26, 24) on the cylinder, the silt outlet at the bottom of each cyclone centrifugal separator (32, 30, 26, 24) is respectively connected with a sand collection tank (31, 29, 27, 25), The outlet on the top of each cyclone centrifugal separator (32, 30, 26, 24) is connected with the inlet of a laminated filter (4, 7, 8, 9) respectively, and each laminated filter (4, The outlets of 7, 8, and 9) are respectively connected to the inlets of a collecting pipe (b1, b2, b3, b4), and the outlets of each collecting pipe (b1, b2, b3, b4) are respectively installed in the water collecting pipe ( 5) On, connected to the drip irrigation system via the outlet pipe.