The invention discloses an outdoor mosquito killer. The outdoor mosquito killer comprises a solar rainproof panel, a mosquito baffle net, a circuit board, a storage battery, a mosquito suction fan, a violet 
LED lamp for 
trapping mosquitoes, a mosquito entrance, a hollow column 
insulation layer, a hollow column, an underground constant-temperature 
pool and the like. In the 
daytime, the solar rainproof panel absorbs 
sunlight, generated 
electric energy is stored in the circuit board and the storage battery, the circuit board and the storage battery automatically start mosquito-killing work before dark, the mosquito suction fan rotates, the violet 
LED lamp for 
trapping the mosquitoes is turned on for attracting the mosquitoes around, and the mosquito suction fan rotating continuously sucks the mosquitoes into a mosquito storage chamber. At nearly 
dawn, the hollow column and the underground constant-temperature 
pool have stable temperature and 
humidity therein, 
carbon dioxide is gathered in a dark environment, the mosquitoes go to the environment in succession for inhabiting, at the moment, the mosquito suction fan and the violet 
LED lamp for 
trapping the mosquitoes still work, and the mosquitoes are sucked into the mosquito storage chamber by the mosquito suction fan until all the mosquitoes are blown and dead.