Total station fixing device suitable for automatic monitoring in subway station rail-mounted area

The utility model discloses a total station fixing device suitable for automatic monitoring in a rail area of a subway station, which comprises a forced centering disc provided with a centering screw used for being connected with a total station; the supporting mechanism is arranged below the forced centering disc and comprises a plurality of first supporting legs which are evenly distributed in the circumferential direction with the centering screw as the circle center, and the top of each first supporting leg is connected with the forced centering disc; the multiple second supporting legs correspond to the first supporting legs, and the bottom of each second supporting leg is connected with a station rail running area bottom plate; and the connecting mechanisms are arranged between each pair of the first supporting legs and the second supporting legs and are used for fixing the second supporting legs on the first supporting legs and enabling the total station to be in a horizontal state. According to the ut