The invention discloses a mosquito-preventing cool pillow, comprising a support frame and a net pillow, wherein the net pillow is laid on the support frame, the left and right sides of the support frame are not closed, a sponge layer is arranged in the net pillow, mosquito-preventing essence is sprayed on the sponge layer, the mosquito-preventing essence is a compound essence containing lemon eucalyptus oil, citionella oil, blumea oil, lavender oil and menthene. The net pillow adopts a rattan plaited structure, is ventilated and cool, and is provided with a soft pillow surface. The mosquito-preventing cool pillow disclosed by the invention is simple in structure and convenient to use, and the sponge layer can be taken out from the left and right sides of the support frame, so that mosquito-preventing essence can be added to the sponge layer, and the sponge layer can be replaced freely. The mosquito-preventing essence sprayed to the sponge layer is aromatic, causes no pollution to the environment and no harm to a human body, and the mosquito-preventing essence contains the lavender oil, has the effect of soothing the nerves and can help sleep; and the mosquito-preventing essence contains the menthene essence composition, has the effects of cooling and calming and is applicable to summer. Therefore, with the adoption of the mosquito-preventing cool pillow, the purposes of calming and soothing the nerves, and improving the sleep quality are realized, and most of all, the mosquito bite is prevented.