【Abstract】 Objective To investigate the breeding situation of mosquitoes in various plashes in urban areas of Chongqing and provide scientific evidence for mosquitoes control. Methods Direct observational method was used to investigate the breeding of mosquitoes in small?sized containers such as miniascape, crock, kettle and tyre, but direct observational method and scoop sampling method used in the  large and medium?sized waters like water pool and lake. The proportion of breeding was recorded. Some larvae were collected and taken back to the laboratory to  be classified. Results Mosquito larvae were found in all kinds of plashes except for fishing pond and lake. The average positive rate in small container was 10.65% (1.45%-91.11%), while it was 18.42% in the large and medium?sized waters. The dominant species were Aedes albopictus and Culex pipiens quinquefasciatus, accounting for 58.18% and 29.56% respectively. Conclusion The management of plashes mosquito should not be neglected in the mosquito control.