One kind of "Micro Cooling Fan" with a fan, belongs fan technology. The technical problem to be solved by the utility model is made out of the blade without adjustment can achieve dynamic balance, and simple structure, assembled quickly and reliably, saving material. To this end, with at least two cam pins and corresponding through-hole "Micro Cooling Fan" at the mating blade with riveted leaf blade seat and mating at the outer ends of the leaf bush care provided bayonet, leaf tray side leaf pin protruding through holes around the central hole seat plate and uniform fit riveting. When assembled "Micro Cooling Fan", fan sleeve onto the motor shaft, the sleeve two bayonet stuck in the pre-cross into the securing pin on the spindle with the nuts securing the blades on the motor shaft.