In applications of feed - forward linearization technique , the overall amplifier efficiency is significant concerned . giving mathematical analysis and simulation results , the paper present two practical methods to optimize the efficiency of a feed - forward amplifier system 针对前馈线性化技术应用中倍受关注的系统效率问题进行了数学推导和仿真,提出实践中提高效率的两种方法及其适用条件。