Automatic telescopic exhaust device

The utility model relates to an automatic telescopic exhaust device which comprises a urinal body (1), an air pipe shell (3) is connected to the urinal body (1), and the air pipe shell (3) is sequentially connected with an air pipe elbow (4), an exhaust hose (5), a pipeline fan (6) and a check valve (7). An inner air pipe (8) and a flushing pipe (9) are arranged in the air pipe shell (3), the front end of the inner air pipe (8) is connected with a water blocking plate (15) matched with the flushing pipe (9), a group of driving motors (10) are connected in the air pipe elbow (4), and output shafts (10a) of the driving motors (10) are connected with a shaft fixing seat (16) of the inner air pipe (8); the urinal body (1) is further provided with an odor discharge port (8a) connected with the inner air pipe (8), and the driving motor (10) is connected with a human body sensor (13) through a signal line (12). The urinal exhaust device has the advantages that peculiar smell emitted by a urinal is extracted from the