The invention discloses a tension spring type arm lifter. The tension spring type arm lifter is formed by connecting a framework, a guide pulley, parallel pulleys, draw cords, hand rings, tension springs and a pedal, wherein the framework is made to be in the shape of inverted U; two upper slots, two angle slots and two lower slots are separately formed in the framework; pulleys are separately mounted in the slots; one section of each draw cord penetrates into the corresponding pulley; the hand rings are separately connected with the upper ends of the two draw cords; the lower ends of the draw cords are separately connected with the tension springs; hangers of joint panels of the tension springs are connected into one in a hanging manner; when a person steps on the pedal, both arms are drawn by the draw cords to lift upwards, and both hands gradually get close and extend in a lifting process, so that the motion range of lifting the arms upwards can be gradually increased by progressive repeated exercise, and therefore, periarthritis of shoulders is finally cured by eliminating a pain restricted zone of motion.