Supine　rollover　plays　an　important　role　in　the　prevention　of　pressure　sores　in　long-term　bedridden　patients.　It　is　of　great　significance　to　study　the　mechanism　of　human　supine　rollover　movement　and　to　design　the　rehabilitation　rollover　mechanism　in　line　with　man-machine　cooperation.　In　human　supine　rollover　movement,　shoulder　and　hip　are　the　key　parts　of　force　application.　Based　on　anatomical　theory,　the　motion　trajectory　information　of　shoulder　and　hip　skeletal　rehabilitation　parts　is　collected　by　combining　optical　motion　capture　and　rigid　body　modeling.　Following　a　kinematics　simulation　analysis,　the　simulation　curve　was　compared　with　the　experimental　curve　track;　the　numerical　difference　was　small.　It　is　proved　that　the　simulation　model　is　correct,　and　it　is　also　shown　that　the　designed　rehabilitation　rollover　mechanism　can　better　reproduce　the　natural　rolling　motion　state　of　the　human　body.　It　can　meet　the　requirements　of　human-machine　synergistic　assisted　lateral　roll　rehabilitation　aids　and　provides　a　solution　for　pressure　sore　prevention.