The utility model relates to a double-layered mosquito net, which is characterized in that: both the two sides of the mosquito net are formed by double-layered curtains, the two sides of the top part of the mosquito net are supported and fixed by poles, a line of support rods are arranged on the side wall of each pole, a line of small holes are arranged at the top part of each inner layer of curtain at the two sides of the mosquito net, and the support rods on the side walls of the poles penetrate out from the corresponding small holes for jacking the outer layers of curtains to be separated from the inner layers of curtains. The double-layered mosquito net not only cannot occupy the sleeping space, but also can avoid being bitten by mosquitoes due to the contact with the two sides of the mosquito net during the sleeping, has a simple structure and is practicable.