Fertilizing device for cotton planting

The utility model discloses a fertilizing device for cotton planting. The fertilizing device comprises a box body, a liquid supply assembly, two outer sleeves, an inner sleeve and a rotary handle assembly, a walking wheel assembly is arranged at the bottom of the box body; a feeding hole is formed in the box body; a handle is mounted at one end of the box body; one end of the liquid supply assembly extends into the box body, and the other end extends out of the box body; the two outer sleeves are installed on the two sides of the outer wall of the box body and communicate with the liquid supply assembly through the three-way connector. A valve is mounted on the outer sleeve, a plurality of first water outlet holes are formed in the bottom of the outer sleeve, and nozzles are mounted on the first water outlet holes; the inner sleeve is rotationally connected into the outer sleeve, and a plurality of second water outlet holes corresponding to the first water outlet holes are formed in the inner sleeve; the rota