Independent drainage structure of polyurethane inward-opening window

The utility model discloses a polyurethane inward-opening window independent drainage structure which comprises a window frame, a frame is arranged below the window frame, a blocking cavity is formed between the window frame and the frame, a first drainage cavity, a first cavity and a second cavity are formed in the window frame, a first drainage hole is formed in the inner side wall of the first drainage cavity, and a second drainage hole is formed in the inner side wall of the second drainage cavity. A second drainage hole is formed in the inner bottom of the first drainage cavity, a second drainage cavity, a third cavity and a fourth cavity are formed in the frame, and a third drainage hole is formed in the inner side wall of the second drainage cavity. According to the utility model, the first drainage cavity and the second drainage cavity are mutually independent, water in the mounting groove is prevented from flowing into the blocking cavity, and the upper baffle and the lower baffle are arranged, so th