Roof anti-blocking water draining and air conveying composite floor drain

The invention belongs to the field of building drainage devices, and relates to a roof anti-blocking water drainage and air conveying composite floor drain which comprises a floor drain body, a waterseal buckling bowl and a water filtering plate. A water storage cavity is formed in the floor drain body, the bottom of the floor drain body communicates with a drainage pipe, and the water seal buckling bowl is located between the drainage pipe and the water filtering plate and connected with the water filtering plate. A sewage discharging device is arranged in the floor drain body and comprisesa mud guiding annular plate and a mud gathering box, the mud guiding annular plate is placed on the bottom face of the floor drain body, the face, close to the water filtering plate, of the mud guiding annular plate is obliquely arranged, a notch is formed in the obliquely-downward end of the mud guiding annular plate, the mud gathering box is located at the bottom of the notch, and the notch communicates with the interior