Insulation coating device for alternating current filter

The utility model relates to the technical field of spraying equipment, and provides an insulating coating device for an alternating current filter, which comprises a spray gun and a nozzle connected with an outlet of the spray gun, and is characterized by further comprising a rack, a fixed supporting seat fixed at one end above the rack, and a movable supporting seat arranged at the other end above the rack, the spray gun is erected between the fixed supporting seat and the movable supporting seat, the movable supporting seat is in sliding fit with the rack and has a horizontal movement freedom degree close to or far away from the fixed supporting seat, and the nozzle is located on the outer side of the fixed supporting seat and has a horizontal movement freedom degree close to or far away from the fixed supporting seat by means of movement of the movable supporting seat. The problems that in the prior art, an operator cannot enter the alternating-current filter to work, an insulating coating with the thickn