System for disconnecting roof rainwater vertical pipe and collecting road runoff rainwater

The utility model provides a system for connecting and disconnecting a roof rainwater vertical pipe and collecting road runoff rainwater, which comprises the rainwater vertical pipe arranged on one side of an outer wall of a building; the rainwater discharge pipe is connected with the bottom of the rainwater vertical pipe; the sponge facility is arranged on the ground of the outer side of the outer wall of the building, and the rainwater drainage pipe is buried below the sponge facility; the drainage ditch is located on the outer side of the sponge facility, a mud settling tank is arranged at the bottom of the drainage ditch, a grating cover plate is erected above the mud settling tank, and the tail end of the rainwater drainage pipe is arranged between the mud settling tank and the grating cover plate; a road is arranged on the outer side of the drainage ditch; and the total pebble bed is arranged in the drainage ditch and on the grating cover plate. According to the utility model, the rainwater vertical pip