Support capable of adjusting measurement distance and use method thereof

The invention relates to a support capable of adjusting a measuring distance and a use method thereof, and the support capable of adjusting the measuring distance comprises three installation parts and a bottom plate. The mounting part is used for mounting a transmitting end or a receiving end of the laser sensor; the three mounting parts are arranged on the bottom plate and are oppositely arranged along the body length direction of the bottom plate; the mounting part located in the middle can move in the body length direction of the bottom plate; a guide rod which penetrates through the mounting part in the middle in a sliding manner is arranged between the mounting parts on the two sides; and the mounting part positioned in the middle can be clamped and fixed with the guide rod through a clamping mechanism. Through the three mounting parts which are sequentially and oppositely arranged on the bottom plate, the transmitting end of the laser sensor can be aligned with the receiving end, and the setting distan