The invention provides a muscular rehabilitation device, comprising a joint sleeve, two fixing rings, two connection tapes, an elastic cord, a measuring socket rod and two connection rings. The two fixing rings are fixed to two ends of the joint sleeve through the two connection tapes and are provided with the connection rings respectively, the two fixing rings are connected through the elastic cord, and the two connection rings are connected through the measuring socket rod. The muscular rehabilitation device is simple in structure, low in cost and convenient to use; rehabilitation can be provided for muscles of multiple parts of the body by changing the sizes of the different parts, such as arms, legs, waist and abdomen, and neck, so that the muscular rehabilitation device is highly applicable; acoustic-optic warnings can effectively remind a user to do in-place acts during rehabilitation, and rehabilitation effect is guaranteed.