Construction water flow branching mechanism of sinking type rainwater slow flow control system

The utility model discloses a construction water flow branching mechanism of a sinking type rainwater slow flow control system, relates to the technical field of water conservancy construction, and aims to solve the problems that the existing water flow branching mechanism is relatively simple in structure and difficult to filter impurities in rainwater, so that the blockage is frequently caused, the later maintenance cost is increased, and the construction efficiency is high. Comprising a foundation, a concentration bin is arranged in the top of the foundation, a water inlet well lid is arranged in the center of the left side of the top of the foundation, a collecting pipe is arranged at the center of the bottom of the water inlet well lid, and a through opening is formed in the center of the left side of the concentration bin; lifting rails are arranged at the front end and the rear end, close to the center, of the left top of the concentration bin inner cavity. And through cooperative use of the filtering