Objective To identify the species compositions, densities and seasonal fluctuation of vectors in Zhejiang province from 2011 to 2013, the aim is to provide scientific and technical support for the prevention and control of vectors. Methods Mosquitoes, flies, rodents and cockroaches were monitored with mosquito lamps, cage traps, traps set at night and glue traps. Results From 2011 to 2013, the mosquito density was 1.52, 1.33 and 1.62 per lamp-hour, respectively, with the highest density found in livestock pens, and the dominant species were Culex pipiens pallen (sure not Cx. quinquefasciatus), accounting for 57.44%. Mosquitoes appeared from April and peak in June through August. The fly density was 8.77, 5.67 and 3.47 per cage, respectively, with the dominant species were Chrysomya megacephala from 2011 to 2012, which became Musca domestica in 2013. The rodent density was 0.89%, 0.81% and 0.78%, respectively, with the dominant species were Rattus norvegicus, accounting for 57.70%. Rodents were observed throughout the whole year. The cockroach density was 0.54, 0.37 and 0.35 per glue trap, respectively, with the dominant species were Blattella germanica, accounting for 88.42% . Conclusion Species compositions, densities and seasonal fluctuation of vectors in Zhejiang province were analyzed through 3-year surveillance, mitigation measures should be taken accordingly to control vectors.