Computer heat dissipation mechanism capable of being automatically controlled

The invention discloses a computer heat dissipation mechanism capable of being automatically controlled, which comprises a case, two USB interfaces are arranged at the top of the case, the computer heat dissipation mechanism further comprises two oil supplementing mechanisms, and a mounting ring is arranged in the case. Through arrangement of a U-shaped scraper, a first telescopic rod, a second telescopic rod and a reset spring, dust on fan blades is scraped away through gravity, through arrangement of a first L-shaped rod, a second L-shaped rod, an inclined plate, a baffle, a piston block, a piston channel and a limiting groove, the scraped dust is collected in a centralized mode, and when the fan blades rotate, the dust on the fan blades is scraped away through the inclined plate, the baffle, a piston block, a piston channel and a limiting groove. The baffle is automatically closed, an additional power source is not needed to clean dust, dust cleaning of the U-shaped scraper next time is facilitated, the cl