The integrated rainwater pump station and the prefabricated rainwater pump station plant area have a combined rainwater and sewage drainage system. Generally, the existing drainage pipe diameter is designed based on the amount of domestic sewage. In rainy days, the water volume is large and impurities are carried in the water. The incoming water contains impurities such as household garbage. In addition to the easy blockage of the water pump, the limited discharge flow of downstream sewage pipelines can easily cause downstream sewage overflow.