Comprehensive utilization system for rainwater

The invention relates to the field of rainwater utilization, in particular to a comprehensive utilization system for rainwater. The system comprises a house roof, a rainwater collection groove, a pressure flow rainwater hopper and a rainwater power generator. The rainwater collection groove is of a groove body structure with an upper opening, a groove body of the groove is formed in the upper endof the house roof, and the pressure flow rainwater hopper communicated with the rainwater collection groove is arranged at the bottom of the rainwater collection groove; a water through groove with anL-shaped main body is connected to the lower end of the pressure flow rainwater hopper, a power generation groove is formed in one side of the water through pipe and communicated with a water generation groove, and the rainwater power generator is arranged in the water generation groove; one side of a power generation wheel of the rainwater power generator is arranged in a water through pipe body, and the lower end of the