Provided is a center-adjustable parallel-type hip-joint rehabilitation robot. The center-adjustable parallel-type hip-joint rehabilitation robot comprises a waist adjusting assembly, a rehabilitationperforming mechanism and leg adjusting assemblies. The rehabilitation performing mechanism is connected with the waist adjusting assembly and the leg adjusting assemblies. The rehabilitation performing mechanism comprises two single-side parallel mechanisms including second waist bases, first thigh connecting devices and three motion chains in the same structure. The waist adjusting assembly and the leg adjusting assemblies all comprise adjusting devices which are combined with added gaskets and liners at corresponding parts. Therefore, the coincidence degree formed between a rotary center ofthe rehabilitation performing mechanism and the center of a hip joint of a human body is effectively adjusted. The center-adjustable parallel-type hip-joint rehabilitation robot is compact in structure and good in rigidity and capable of adjusting the center. A patient with the hip joint being worn or injured can perform postoperative hip-joint rehabilitation training and be assisted to work. Through an adjusting function, the coincidence degrees formed among the rehabilitation performing mechanism and rotary centers of hip joints of different patients are adjusted. Therefore, the harm of man-machine interference force to limbs of the patients is avoided.