A　pump　start-stops　optimization　method　was　proposed　to　realize　the　frequent　start-stops　in　rainwater　pump　station.　Through　analyzing　the　design　parameters　and　operation　principles,　the　optimization　model　of　pump　start　water　level　was　obtained　by　SWMM(storm　water　management　model)　and　PSO(particle　swarm　optimization　algorithm).　The　feasibility　of　the　optimization　method　was　verified　by　comparing　with　manual　debugging　method.　The　research　results　show　that　the　optimization　method　can　minimize　the　start-stop　frequency,　achieve　a　better　effect　of　bump　start-stops　and　get　rid　of　the　complex　manual　debugging　process,　which　will　provide　reference　for　the　pumping　water　level　selection　of　rainwater　pumping　stations.　©　2017,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.