Rainwater and sewage riser transformation system

The utility model discloses a rainwater and sewage vertical pipe transformation system. The device comprises a rainwater vertical pipe, a first sewage vertical pipe, a second sewage vertical pipe, a trap and a third sewage vertical pipe, the first sewage vertical pipe is arranged on the rear side of the joint of the sewage inflow port and the rainwater vertical pipe, a blind plate is arranged at the joint of the sewage inflow port and the rainwater vertical pipe, the second sewage vertical pipe is connected with the first sewage vertical pipe, and the water return bend is arranged between thesecond sewage vertical pipe and the third sewage vertical pipe. A blow-off pipe is arranged at the tail end of the third sewage vertical pipe so as to discharge sewage to a sewage pipe network; an original mixed flow vertical pipe is arranged at the lower end of the connection position of the rainwater vertical pipe, and a drainage pipe is arranged at the tail end of the original mixed flow vertical pipe so as to drain ra