In this article,a two way RF/FSO relay transmission system with energy harvesting under the influence of atmospheric turbulence and pointing errors is designed.The RF signal part adopts power splitting for energy collection,and the FSO signal part collects the energy carried by the direct current component of the signal and stores it in the relay.Among them,the radio frequency RF link adopts the Nakagami m channel fading model,and the free space optical FSO link adopts the Gamma Gamma channel fading model.The cumulative distribution function CDF of the two links is calculated.The relay cooperation method of DF is adopted,the Meijei G function is used to derive the closed expression of the system outage probability,and finally the correctness of the result is verified by simulation.