State indication board with self-locking function

The utility model relates to the technical field of state indication boards, in particular to a state indication board with a self-locking function, which comprises a panel and a state disc which are rotatably connected, the state disc is uniformly divided into a plurality of areas, the panel is provided with a window, the state disc is provided with a through hole and a rotary column, and the through hole is communicated with the rotary column. The panel is provided with a plurality of through holes, the through holes are formed in the joint of every two adjacent areas and communicated with the rotary column, balls are arranged in the rotary column, the rotary column is connected with an adjusting piece abutting against the balls, a spring is connected between the balls and the adjusting piece, the panel is provided with a plurality of positioning grooves corresponding to the balls, and the positioning grooves correspond to the balls. The number of the positioning grooves is consistent with the number of are