Abstract: The present invention provides a mosquito trapping device, which comprises a carbon dioxide generating module, a temperature control module, a humidity control module, and a mosquito-killing module. The carbon dioxide generating module comprises a container A and a container B, a solution in the container A reacts with a solution in the container B to generate carbon dioxide; the temperature control module controls a temperature of the mosquito trapping device to be between 38° C. and 45° C.; the humidity control module controls humidity of the mosquito trapping device to be between 50% and 80%; the mosquito-killing module generates a guiding wind having a wind speed of 0.7 m/s to 15 m/s. The present invention has a good mosquito-attracting effect and a desirable mosquito-killing ability.