Aiming at the problem of deployment strategy of service function chain（ SFC） based on SDN/NFV cannot optimize network performance

at the same time

reduce resource consumption

a global optimal deployment strategy based on simulated annealing particle swarm optimization（ PSO） algorithm is proposed. Firstly

consider the factors of network node and logical link synthetically to build a multi-objective linear programming model with time delay

average path length and load strength as optimization goals. After that

the particle swarm algorithm is used to solve the service chain deployment problem

thereby construct an approximately optimal service path.Simulation experiments show that the proposed strategy reduces the load intensity

mapping cost

and total delay

at the same time

improve the service request acceptance rate.