A novel path generation algorithm for fiber placement is presented based on the generalized helical line on canal surface. Here the problem of path planning on the mould surface is transformed into the solution on generalized helical line. With this algorithm, the accurate generalized helical line is obtained by numerically solving the initialval ue problems for a system of first order ordinary differential equations. The new algorithm can be solved by ODE45 func tion of powerful Matlab based on adaptive 45 order Runge-Kutta algorithm. So the constructed fiber placement path has control mechanism for absolute and relative error. The practical examples indicate that this algorithm is easy to operate and the precision requirements of automatic fiber placement are easily satisfied.