Objective To investigate mosquito composition,distribution and habitats in Chuxiong prefecture of Yunnan province and provide evidences to prevent local arboviral infectious diseases. Methods Three counties were choosen and then two natural villages in each county were selected randomly from July to August in 2014. Adult mosquitoes were collected by overnight trapping with light trap and double-bednets. Larvaes were collected in different breeding sites around villages. Results A total of 12 711 adult mosquitoes from 23 species of 6 genera in 2 subfamily were collected. Among them, 12 384 adult mosquitoes from 15 species in 4 genera were collected by overnight trapping with light trap and the maximal amount species were Culex tritaeniorhynchus (59.95%). The average population density of adults mosquitoes were 344.00 of each light trap with overnight trap. Besides, a total of 327 individuals were collected from 11 species in 4 genera by double-bednets, of those Aedes albopictus as dengue vector were local predominant species (19.88%). The average population density of adult mosquitoes was 5.90 per labor hour by double-bednets. A total of 8 586 larvae were collected from 22 species of 6 genera in 2 subfamilies, of those Cx. tritaeniorhynchus was the most (27.50%). Conclusion The species richness was high in 3 counties of Chuxiong prefecture and different mosquito species with different habitats. The predominant species were Cx. tritaeniorhynchus. Other four species including Cx. pipiens quinguefasciatus, Anopheles sinensis, An. minimus, and Ae. albopictus were sub-dominant species. Afore mentioned five mosquitoes specises are wild spread with large populations and deserve our attentions.