Aiming at the dynamic controllability of sorting robots in automatic production lines, the work aims to propose a 2UU-UPU 3-DOF parallel sorting robot to improve the accuracy and controllability of sorting. The relationship between the degrees of freedom and various parameters of the robot was analyzed, and an inverse kinematics model of the parallel mechanism was established based on closed-loop vector method. The dynamics expression of the robot was derived using Lagrange dynamics equations, and numerical calculations were performed. The dynamic joint simulation of the robot was performed using Matlab Simulink and Adams, and the error analysis of the theoretical and simulation values was performed. The motion law of the robot's moving platform was revealed, and the driving moment curves were obtained. The error between the theoretical value and the simulation value was small, with the maximum error of the three driving torques being 0.379%, 0.283%, and 0.146%, respectively. It is verified that the mechanism has good dynamic characteristics, laying a foundation for the subsequent motor selection and precise control.