Abstract: Establishing the parameter model line is the precondition and key process for the design optimization of the turbine blade.According to three cubed Bezier curve,the equations of the turbine blade model lines were calculated detailed by making full use of the basic geometry parameters of the turbine,and the parameterized model lines were established.According to the model,the particle swarm optimization（PSO） algorithm was introduced to help regenerating the actual turbine blade model lines and the detailed algorithm procedures were given in this paper.The results show that,the parameterized model of the turbine displays high smooth performance and excellent capability to control the shape.The method of regenerating the actual blade model lines based on PSO algorithm is efficient and precise.The model and algorithm is important to the design optimization of turbine blade model line.