[目的]掌握永康市蝇密度和季节消长等动态变化规律,为蝇类及其传播疾病的控制提供依据。[方法]采用笼诱法进行蝇类监测,4—11月份每月监测1次,每次选择农贸市场1处、餐饮外环境2处、绿化带1处、居民区1处作为固定监测点。[结果]2009—2011年监测点共捕获蝇类681只,平均蝇密度为5.68只/笼,主要优势蝇种为家蝇、铜绿蝇、市蝇;蝇密度从高到低依次为农贸市场、餐饮外环境、居民区、绿化带;季节消长呈单峰型曲线,在7、8月出现高峰。[结论]永康市城区存在多种媒介蝇,建议加强蝇类综合监测,降低蝇密度,控制蝇传疾病。 [Objective] To master the dynamic changes of flies density and seasonal fluctuation in Yongkang and provide the basis for the control of flies and their transmitted diseases. [Method] Cage induction method was used to monitor the flies. The monthly monitoring was conducted from April to November. Each time, one farmer’s market, two catering outside environments, one green belt and one residential quarter were selected as fixed monitoring points. [Result] A total of 681 flies were collected at monitoring points from 2009 to 2011, with an average flies density of 5.68 per cage. The dominant flies were housefly, copper green flies and flies, while the flies from high to low were farmers’ markets, Catering environment, residential areas, green belt; seasonal fluctuation showed a single peak curve, peaked in July and August. [Conclusion] There were many kinds of vector flies in the urban area of ​​Yongkang city. It is suggested to strengthen the comprehensive monitoring of flies, reduce the density of fly and control the disease of fly transmission.