Ceiling embedded type ventilating fan

The utility model discloses a ceiling embedded type ventilating fan which comprises a frame, a fan body and a fan cover. The multi-wing centrifugal fan and the snail shell are arranged in the frame, the fan blades and the motor are located in the snail shell, the snail shell comprises an upper snail shell plate, a lower snail shell plate, a tongue part, a rolling plate and an air inlet, and the rolling plate is provided with an air path which is slightly a circle in the rotating direction from the tongue part to the fan blades; the wind shield is arranged on the inner side of the fan blade, is provided with a bending piece formed by bending in the direction opposite to the rotating direction of the fan blade and away from the inner side of the fan blade, and is located within the range of 0-150 degrees in the clockwise direction from the connecting line of the center of the fan blade and the air outlet direction of the air outlet. The air baffle is arranged in the middle of the airflow pressure of the air pat