The invention discloses a multi-sensor fusion based lower limb strength assessment method and aims to solve technical problems of high time and labor consumption and high error in application of an existing lower limb strength assessment method. The method involves an acquisition module in communication connection with a computer module, and the acquisition module comprises a human posture information acquisition module and a sole pressure information acquisition module. The method includes steps: S100, the human posture information acquisition module and the sole pressure information acquisition module acquire position and sole pressure data of a same human movement and send to the computer module; S200, the computer module calculates characteristic parameters according to data acquired by the acquisition modules, extracts characteristic values and gives assessment results recorded as a first decision and a second decision, and all characteristic parameters obtained by the human posture information acquisition module and the sole pressure information acquisition module are subjected to fusion analysis in a fusion center to obtain a movement posture assessment result. The lower limb strength assessment method is simple, convenient and quick and is accurate in measurement.