Anti-interference environment-friendly detection instrument

The anti-interference environment-friendly detection instrument comprises an instrument body and a protective shell, the instrument body is horizontally arranged in the protective shell, a mounting opening corresponding to the instrument body is formed in the top of the protective shell, and a plurality of symmetrically-arranged insertion rods are inserted into the inner side wall of the protective shell in a sliding mode. An inserting groove corresponding to the inserting rod is formed in the outer wall of the instrument body, an L-shaped supporting rod is fixedly connected to the end, away from the instrument body, of the inserting rod, a sliding cavity corresponding to the L-shaped supporting rod is formed in the outer wall of the protective shell, a limiting block is fixedly connected to the end, located in the sliding cavity, of the L-shaped supporting rod, and the L-shaped supporting rod is sleeved with a first spring. The two ends of the first spring are fixedly connected with the inner wall of the sli