Objective To investigate the population dynamics of mosquitoes in Beitun of Xinjiang Uygur Autonomous Region,China, and to provide countermeasures for the control of mosquitoes in Beitun.Methods The population dynamics of mosquitoes were monitored continuously from April to September during 2011-2013. The number of immature mosquitoes in different aquatic habitats was monitored every two days. The water bodies positive for immature mosquitoes were sprayed with biological agents (Bacillus thuringiensissubsp. israelensis please specify the product used) and continuously monitored for 48 hours. The number of adult mosquitoes was surveyed by light trap capture from 10p.m. to 12 p.m. every day at the city square of Beitun.Results Immature mosquitoes appeared from May to July, with a peak density from late May to early June. The density of immature mosquitoes in breeding sources was 18 240 mosquitoes/m². The control efficacy of biological agent (B.t.i) reached up to 96%. Adult mosquitoes usually appeared from April to September, with a peak activity period from June to July. The highest density of adult mosquitoes was 85 mosquitoes per day (determined by light trap). Mosquito density showed decline curve by two times of aerial spraying insecticides including biological pesticides B.t.i(Titer 480 ITU/mg) and 2.5% lambda-cyhalothrin EC,10% acetamiprid EC and silicone additives to control mosquito.Conclusion Mosquito density used to be high in Beitun, but was decreased by 75% through integrated control for three years.