A kind of bone plate gimbal lock pressure device. The body of the bone plate (1) has a microscler slippery hole (2), in which there has a locking slider (3); on the slider (3) there is a cone-shaped screw hole (3-3) with a cone-head screw (4) inside. The shapes at two inside sides of the microscler slippery hole (2) cross section are internal arc-shaped, and the shapes of the two sides of the locking slider (3) are correspondingly external arc (3-1); in the middle of the locking slider (3) there is a notch (3-2). The locking slider (3) can slide in the microscler slippery hole (2) to meet the pressure requirement, and also can sway from side to side to adjust the direction of the cone-head screw (4) according to the requirement. The two sides of the locking slider (3) are arc; after tightening the screw (4), the arc contact will make the locking slider (3) not take off.