The invention relates to an ecological bionic mosquito killing device, and belongs to the field of mosquito killing. The ecological bionic mosquito killing device comprises an upper cover, a box body, a base and rainproof eaves, wherein the upper cover, the box body, the base and the rainproof eaves are connected in a detachable connection mode. A control component, a supporting plate a, a supporting plate b, a fan motor, a fan, a combustion device, a high-voltage grid, a protective net, a baffle, a liquefied gas bottle and a gas guide tube are arranged inside the ecological bionic mosquito killing device, wherein the fan motor is fixedly arranged between the supporting plate a and the supporting plate b, the fan is fixedly installed on a motor shaft, the high-voltage grid is arranged below a supporting plate c, the protective net is arranged below the high-voltage grid, the baffle is arranged below the high-voltage grid in an inclined mode, the liquefied gas bottle is arranged below the baffle, the liquefied gas bottle and the combustion device are connected through the gas guide tube, and a solenoid valve is arranged on the gas guide tube. When the mosquito killing device with the structure and various trapping modes conducted according to carbon dioxide, the temperature, the human body sweat smell and the color are adopted, the capacity of luring mosquitoes can be greatly improved; due to the fact that an ultraviolet device and insecticide are not used, killing of beneficial insects with phototaxis is effectively avoided, the pollution to humans or the environment is effectively avoided, and the ecological bionic mosquito killing device is ecological and environmentally friendly.