Vacuum pump capable of preventing liquid from being sucked

The utility model provides a vacuum pump capable of preventing liquid from being sucked, which comprises a main body, the bottom of the main body is provided with a suction opening, the main body is provided with a suction pump mechanism and a suction cavity, the suction pump mechanism comprises a suction end, a suction channel communicated with the suction end is formed at the upper end of the suction cavity, and the lower end of the suction cavity is communicated with the suction opening. A buoy piece is arranged in the air exhaust cavity and floats upwards along with rising of the liquid level in the air exhaust cavity, and a blocking face used for blocking the air exhaust channel is formed at the upper end of the buoy piece. According to the vacuum pump capable of preventing liquid suction, water and other liquid can be prevented from being sucked into the shell of the main body during air suction, damage or odor caused by water entering the shell is avoided, and the service life is prolonged; and additio