The invention discloses a lingualis exercising device. The device comprises a tooth socket, a tongue plate negative pressure airbag, an air cylinder airbag, an upper fixed block and a lower fixed block are fixedly installed on the tooth socket, and the upper fixed block is fixedly installed on an upper tooth socket portion; a first rotary shaft is movably installed in the upper fixed block, an aircylinder is fixedly installed on the first rotary shaft, and a tongue plate connecting rod is fixedly sleeved with a tongue plate shaft; a tongue plate is fixedly installed on the side, away from thetongue plate shaft, of the tongue plate connecting rod, the lower fixed block is fixedly installed on a lower tooth socket portion, and a supporting rod is fixedly installed on a second rotary shaft;the side, away from the upper fixed block, of a hole passage is fixedly connected with a tongue plate connecting rod through a pipeline, and the hole passage is formed in the tongue plate connectingrod. The lower portion of the tongue is sucked through the negative pressure of a tongue plate, the tongue is assisted in rolling backward through the opening and closing of the oral cavity, thereforethe effect of exercising the tongue root and the tongue lingualis is achieved, the lingualis exercising can be completed just in the oral cavity, the infection phenomenon cannot easily occur, the device is practical and sanitary, and the using is convenient.