The invention relates to an eco-purification integrated processing system for rainwater on campus. The system comprises a rainwater collection and purification area, a riverway water storage sightseeing area, a tree irrigation area and an intelligent irrigation monitoring system, wherein the rainwater collection and purification area comprises a flower and plant vegetation stratum, a purification packing layer, a water storage perforated cover plate and a water storage area, which are successively arranged from top to bottom, as well as a water drainage packing layer, a water drainage perforated cover plate and a water drainage ditch, which are successively arranged at the bottom of the water storage area from top to bottom, wherein the water drainage ditch is communicated with the riverway water storage sightseeing area; the tree irrigation area comprises a plurality of infiltrating irrigation devices buried in soil on two sides of trees, the infiltrating irrigation devices are communicated with one another through water pipes, the infiltrating irrigation devices comprise water injection parts and infiltrating irrigation parts arranged below the water injection parts, the infiltrating irrigation parts and the water injection parts are mutually communicated, the infiltrating irrigation parts are provided with a plurality of infiltrating irrigation holes, and two ends of the water injection parts are provided with water injection holes; the water injection holes are communicated with the water pipes through a solenoid valve, and the water pipes are further communicated with the riverway water storage sightseeing area. By the technical scheme disclosed by the invention, the ecological cyclic utilization of the rainwater on campus can be realized.