The invention is applied to the field of fastening tape processing and provides a chlorine-resistant fastening tape and a manufacturing method thereof. The manufacturing method comprises the following steps of: dissolving oily fluorocarbon resin with butyl acetate to form an oily fluorocarbon resin solution; dissolving polyester urethane resin with butanone and adding a cross-linking agent into the mixed solution to form a polyester urethane resin solution; placing the oily fluorocarbon resin solution and the polyester urethane resin solution into a container for fully and uniformly mixing to form chlorine-resistant coating adhesive; coating a layer of chlorine-resistant coating adhesive at the fastening tape ands drying; adding waterborne acrylic resin, a closed isocyanate curing agent, a titanic acid ester cross-linking agent and waterborne fluorocarbon resin into a container containing hot water of 40-60DEG C and uniformly stirring to obtain a chlorine-resistant work liquid; and placing the fastening tape into a general dip dyeing machine and dipping the chlorine-resistant work liquid and then dehydrating the fastening tape and drying the fastening tape at the temperature of 95-105DEG C. The chlorine-resistant fastening tape provided by the invention can be used in environments containing chlorine ions such as sea water and swimming pools and has the advantages of high color fastness and long service life.