The reasonable rolling schedule is not only beneficial to improve the accuracy and achieve good shape of cold rolled steel strip, but also has practical value in prolonging the service life of equipment and improving the production efficiency of enterprise. It tends to reach premature convergence when particle swarm optimization algorithm is applied in the optimization of rolling schedule. Based on the rapid convergence of particle swarm optimization algorithm and evenly traversal of Tent sequence, a collaborative optimization algorithm which combines particle swarm optimization algorithm with chaos searching is introduced in this paper. The proposed algorithm can overcome the disadvantage that particle swarm optimization algorithm easily falls into the local minimum, and find pressure rate satisfying the preset target function using less iteration times and optimal time, and realize the optimal rate target.