The invention provides a mechanism motion parameter test device based on multi-sensor fusion, which belongs to the technical field of mechanical principle mechanism kinematics. The invention provides a novel test device which be quickly installed in a matching manner in the mechanism motion parameter test link, meet the need for synchronous test at multiple test points, implement digital trajectory measurement, detect the composite motion of components, greatly simplify the complexity of the experimental test link, and realize multi-sensor fusion test. The invention provides a novel test device and a using method thereof. The device has the advantages of simple structure, convenient installation and matching, low cost, and the like, and can meet the experimental requirement of simultaneous detection of multiple test parameters at multiple measurement points.