In order to meet the requirements of the sixth generation mobile communication ( 6G) system for high speed and large capacity of optical communication network,furth er improving the bandwidth,response rate and amplification of optical fiber amplifier in optical transmission network has become the focus of current research. Tellurium fiber is used as fib er gain medium, and a modified particle swarm optimization algorithm is proposed,which dynamica lly adjusts the individual velocity,position and inertial weight values during the iterative pr ocess to obtain higher convergence speed and enhance the global search capability.The algorithm is app lied to optimize, analyze and verify the configuration of each pump light parameter of Raman fiber amplifier,and finally,the average gain of the back-pumping Raman fiber amplifier is up to 23.7388dB and the gain fluctuation is about 0.2098dB.The results show that the modified particle swarm optimization algorithm can optimize the Raman fiber amplifier pump power and wav elength accurately and quickly,and can improve the performance of Raman fiber amplifier effec tively,which hasa certain reference significance for the design of Raman fiber amplifier in the future.