The utility model relates to a power equipment technical field especially relates to a voltage transformer terminal box rain insensitive device. The device's rain -proof cover is personally experienced sth. Part of the body including the cover that can cover the terminal box, and the bottom of the cover body is uncovered, and the vertical both sides of the cover body all are provided with the morethan one screw hole, coupling assembling is provided with two sets ofly, and two sets of coupling assembling set up with the vertical perpendicular bisector symmetry of the cover body, whenever, allinclude more than one connecting screw rod to coupling assembling, connecting screw rod and screw hole correspond and set up, and every connecting screw rod's one end setting is in the outside of thecover body, and every connecting screw rod's other end screw thread passes corresponding screw hole to the top is leaned on on the outer wall of terminal box. The utility model discloses can not influence the inside situation of terminal box during the dismouting yet, have fine commonality.