Hydraulic gate device

The invention discloses a hydraulic gate device. The hydraulic gate device comprises a gate lifting plate (5) for opening or closing a gate (15) in a wall body (1), and a fixed frame (2) fixedly mounted on the wall body (1), wherein the upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting driving thread sleeve (44); an external thread is arranged on the outer peripheral surface of the lifting driving thread sleeve (44) for matching with an internal thread in a lower driving thread piece (41) rotationally mounted in the fixed frame (2) and driven by a lower driving device (43); and an axial extending chute (40) is formed in the inner peripheral surface of the lifting driving thread sleeve (44) for enabling a radial extension part (35) fixedly connected to the lower end of a thread rod (34) capable of penetrating through an inner cavity of the lifting driving thread sleeve (44) to axially slide and fixedly matching with the radial extension part in the peripheral directi