The invention provides a method for determining sensitivity indexes of hinged clearance wearing of a revolute pair of a mechanism. The mechanism at least comprises a rotating part, wherein the rotating part includes a rigid body i of a first rod member, a rigid body j of a second rod member and the revolute pair; the rigid body i of the first rod member and the rigid body j of the second rod member are hinged together through the revolute pair; the rigid body i of the first rod member and/or the rigid body j of the second rod member are/is also hinged with other kinematic pairs; the revolute pair includes a shaft pin and a shaft sleeve. The method comprises the steps of: processing each rotating part; establishing a multi-body dynamic model of all rigid bodies of the mechanism under the constraint of the revolute pair and other kinematic pairs connected with the rigid bodies based on a multi-body dynamic theory, and establishing a revolute pair clearance dynamic model; and obtaining and ranking the sensitivity indexes of the mechanism performance for clearance wearing of each hinged revolute pair. According to the method, the influence degree of wearing of different revolute pairs of the mechanism is mastered from a design stage and thus a weak link of the mechanism is determined.