For the lack of the standard of Particle Swarm Optimization algorithm to solve vehicle scheduling problem,this paper puts forward a Particle Swarm Optimization strategy which is based on a kind of integral coding.The strategy is based on the evolution-thought of Particle Swarm algorithm,gives the three-step optimal method.This paper refines the evolution way of the particle's speed and position.With Floyd algorithm,it simulates the scheduling model and analyses it.The results sho...