In order to correct the nonstandard riding postures of riders, a parametric modeling method for realizing standardized riding is proposed. Firstly, a manikin and a bicycle model are created, and parameters of the bottom layer, middle layer, and high layer are defined, so as to realize model parameterization. Secondly, force analysis during the riding is carried out, and a kinetic model is established, so as to ensure that the virtual riding conforms to the natural motion law. Finally, the constraint relationship between human upper and lower limb parameters and bicycle parameters is established to realize the coordinated movement of human joints, and the motion during the riding is simulated. The simulation results show that this method can provide correct posture guidance for riders.