Roof drainage gutter capable of preventing water leakage

The utility model discloses a roof drainage gutter capable of preventing water leakage. External wall panel, a catching groove is fixed on the outer wall plate; a gutter is fixed on one side of the outer wall plate; the gutter is of an L-shaped structure, high-elastic rubber waterproof paint is laid at the bent position of the gutter and the position between the contact faces of the gutter and theouter wall plate, a high-pressure cement plate is laid on the gutter, a waterproof roll is laid on the surface of the high-pressure cement plate, a U-shaped clamp is arranged at one end of the gutter, and a polyurethane soft foam plug is arranged on the U-shaped clamp. The device is reasonable in structural design; waterproof performance, gutter is made of steel plates, the roof gutter is simplein structure, high in integration degree, high in sealing performance and good in corrosion resistance effect, the high-pressure cement board and the waterproof coiled material are adopted for laying,dual waterproofing is cond