The invention relates to a multifunctional robot for sitting-standing mobility assistance and rehabilitation exercise training and belongs to the field of machinery. The multifunctional robot for sitting-standing mobility assistance and rehabilitation exercise training comprises a top hanger device, support oblique beams, support inner tubes, a master control transmission box, armrest cross beams,armrest supports, base main beams, moving support rods and the like. Weight-reduced assisted sitting-standing protection and rehabilitation exercise training are achieved through the two transmissiondevices, a lower limb correction assist exoskeleton structure fixed to legs and a top dumbbell-like spiral reel unit, under driving of a central control motor. According to kinematic analysis, underclinical bid data statistics, for lower limb joints, shoulder points and body center of mass during body stand-up, a user with lower limb mobility difficulties can gain sitting-standing mobility assistance at the premise of meeting ergonomics, rehabilitation training can be performed on lower limb muscles in complete standard accordance with correct force exertion plans of muscles during stand-upof a healthy body, abnormal force exertion of muscles due to distortion of stand-up attitude is avoided, and therefore, safe and healthy exercise rehabilitation training is achieved.