The invention discloses a production technology for a Ku-band 40W power amplifier. The production technology comprises the steps of S1, sintering a Rogers circuit board on a cavity; S2, sintering a resistance-capacitance device on the circuit board; S3, sintering power amplifier tubes on the cavity; S4, mounting a preamplifier, a filter and isolators on the cavity; S5, sintering a power module circuit board and mounting the power module circuit board on the cavity; and S6, carrying out debugging, testing and capping. According to the production technology for the Ku band 40W power amplifier provided by the invention, a technological process is scientific, simple and convenient, the yield of produced products is high, the production efficiency is improved, and the production cost is reduced.