The invention discloses an edge sealing apparatus for filter paper. The edge sealing apparatus comprises a frame, a hot-melt adhesive machine, an adhesive dispensing head, a cylinder, a clamp, a circuit controller, a supporting rack, chutes, clamping plates and spacing holes. The edge sealing apparatus is characterized in that the hot-melt adhesive machine is fixedly arranged on the frame; the adhesive dispensing head is connected with the adhesive outlet of the hot-melt adhesive machine the cylinder is fixedly arranged in the frame; the adhesive dispensing head is clamped on a fixture; the frame is provided with the circuit controller; the supporting rack is fixedly arranged on the frame; the supporting rack is provided with one chute through a gear; the left end of the chute is fixedly provided with one clamping plate; the left end of the clamping plate is fixedly provided with another chute; another clamping plate is slidably installed between the two chutes; each clamping plate isprovided a spacing hole; and the spacing hole penetrates the front and back surfaces of the clamping plates. The edge sealing apparatus provided by the invention has the advantages of improved work efficiency and low manufacturing cost.