The invention relates to a rehabilitation exercise device, in particular to a medical interest empty-pedal rehabilitation exercise device. The technical problem to be solved is to provide a medical interest free kick rehabilitation exercise device for free kick exercise legs and counting leg exercises. The medical interest empty-pedal rehabilitation exercise device comprises a base, a first vertical support plate, a first bearing, a first shaft, a rocker, a worm, a fixing plate, a cam, a worm wheel, a support seat, a swing seat, a seat, a first transverse support plate and the like; the left side upper part of that base is fixedly connected with a first vertical support plate, a first bearing is embed in the upper part of the first vertical support plate, a first shaft rod is interference-connected in the first bearing, a crank is fixedly connected at the left end of the first shaft rod, and a worm is connected at the right end of the first shaft rod. The invention has the functions ofexercising legs and counting legs, realizes interesting exercise and exercises shoulder joints of upper limbs. The invention has the characteristics of convenient use, safe use, simple operation, lowmanufacturing cost.