In this paper, based on the structural features of twin tripod sliding universal joint, by using the CAD software Pro/E technology, the author first established the three-dimensional solid model of the twin tripod sliding universal joint, then compared the kinematics analysis under the following two circumstances ,that is, with or without a clearance of kinematic pairs and obtained the kinematical regularities of various components of the twin tripod sliding universal joint, which can provide a theoretical basis for the further research of the impact of the clearance on the tripod universal joint.