The invention belongs to the technical field of municipal drainage pipelines and particularly relates to a discarding catch basin connected with an anti-silting precipitation trash removal pipeline. The discarding catch basin connected with the anti-silting precipitation trash removal pipeline comprises the anti-silting precipitation trash removal pipeline and an discarding catch basin, wherein the anti-silting precipitation trash removal pipeline comprises a rainwater pipeline wall, an impermeable layer, a rainwater pipeline bin, trash cut inclined nets, buffer slopes, precipitable gratings,bottom precipitation ports, high-lift trash removal pumps, silt output pipelines and precipitation desilting grooves; the discarding catch basin comprises a storage and purification tank, a catch basin cover, an activated carbon core filter layer, an oil removal layer, a nonwoven geotextile layer, connecting rods, float balls, a piston slide, slide pistons, discarding water collection control cavity control holes, an discarding water collection control cavity, an discarding down pipe, a drainage pipeline, rainwater pipelines, a water pump and a water pumping pipe. The discarding catch basin purifies, stores and recycles rainwater while the rainwater is drained effectively, so that automatic control of desilting, purification, discarding and storage of the rainwater is realized, and industrialization process and sponge city construction can be promoted.