Height limit guide board for unmanned toll station

The utility model relates to the technical field of height-limiting guide boards, and discloses an unmanned toll station height-limiting guide board which comprises a base. The supporting column is arranged in the base; the guiding board is arranged at the top of the supporting column; the LED screen is arranged on the front surface of the guide board; the replacement assembly comprises a mounting part and a lifting part, the mounting part is located on the outer wall of the front face of the guide board, a replacement part is arranged in the mounting part, and the lifting part is located at the bottom of the supporting column. The information board is pushed backwards to drive the extending body to move backwards until the extending body is separated from the position between the two limiting plates, then the information board is rotated to enable the extending body to rotate to the position aligned with the through groove, after the information board is loosened, the spring pushes the connecting disc and th