The invention discloses a self-volatilization type mosquito repelling device. The device comprises a box body, the top of the box body is in threaded connection with a cover body, and a rotating speed adjusting cavity and a volatilization cavity are arranged inside the cover body from top to bottom. A rotating speed limiting mechanism is arranged in the rotating speed adjusting cavity and comprises a first rotating shaft and an L-shaped cylinder, the first rotating shaft is coaxially and rotatably arranged in the rotating speed adjusting cavity, and oblique teeth are evenly arranged on the outer side of the first rotating shaft; and the L-shaped cylinder is arranged on one side in the rotating speed adjusting cavity and comprises a horizontal pipe section and a vertical pipe section which communicate with each other, a piston is arranged in the horizontal pipe section in a sliding mode, an abutting rod is vertically arranged on the side, close to the rotating shaft, of the piston, and the end, away from the piston, of the abutting rod extends to the position between the oblique teeth of the first rotating shaft. The mosquito-repellent liquid release time can be adjusted, after the mosquito-repellent liquid is automatically diffused for a period of time, blocking is automatically conducted to avoid waste of the mosquito-repellent liquid, in the mosquito-repellent time period, the mosquito-repellent liquid volatilization efficiency and diffusion efficiency are improved, electric energy is not needed, and energy conservation and environment protection are achieved.