Abstract: A new three degrees of freedoms completely deeoupled parallel mechanism is presented, whose moving platform has a one-dimensional translation and two-dimensional rotations. Firstly the degrees of freedom are calcu-lated and the active joints are chosen. Then the position equation of the mechanism is presented and its direct and inverse analytical solutions are derived. Ditect and inverse Jacobian matrix and the velocity are obtained through the first derivative for the position equations. By using influence coefficient method, the second-order influence coeffi-cient and the acceleration are derived. In addition, as the global Jacobian matrix is lower tion of the mechanism is tion example is given for completely decoupled, which the kinematics curve by using triangular matrix, the mo-simplify dynamic analysis and control. At last, an applica-Matlab.