The designing and realizing of the VSAT RF power amplification chain are presented. Based on the applying environment and the technique requirement, the number of the stages, the Gain of each stage and the output power of each stage are designed. Again based on the requirement of low cost and small volume, the configuration, active devices and substrate material of each stage of circuit are chosen. According to the requirement of system, some power detecting points and power controlling switch are provided for the amplification control chain. The results of design and development show that the circuits can provide 67 dB Gain, 5W output power, ± 1dBpp pass band ripple from 5925MHz to 6425MHz, the isolation of the channel switching is larger than 40dB.