Machined surface texture is very critical factor since it directly affects the surface quality and part mechanical behavior, especially, the surface roughness. In this paper, a new model is presented to build kinematic relationship between the arbitrary point of the cutter edge and the arbitrary point of the machining feature, the ruled surface texture is first evaluated by means of calculating an deviation value along a normal direction of an arbitrary point on nominal part surface in terms of the proposed model, three dimension profile can also be simulated, two examples are used to verify the feasibility of the proposed model.