Sensing unit with strong anti-interference performance for pasture

The utility model discloses a sensing unit with strong anti-interference performance for a pasture, which comprises a sensing unit body and a movable rod, and the top of the sensing unit body is provided with a sliding positioning mechanism; the sliding positioning mechanism comprises a C-shaped sliding frame and a positioning block, the bottom plane of the C-shaped sliding frame is connected with the top of the sensing unit body, the movable rod is sleeved with the C-shaped sliding frame, the top opening of the C-shaped sliding frame is connected with the positioning block, a hollow cavity is formed in the positioning block, a positioning shaft is installed in the hollow cavity, and a pull button is installed at the top of the positioning shaft. The positioning shaft is sleeved with a compression spring in the hollow cavity, a limiting disc is installed at the bottom of the compression spring, positioning grooves matched with the bottom of the positioning shaft are formed in the top of the movable rod at equ