The design method, manufacture and test results of a Ka band HMIC front end, which has been developed recently in SWIET, were reported. The front end, which is composed of a local oscillator module, a transmitter and a receiver, has not only good electrical performance, but also other merits such as miniature size, light weight and high reliability. Test results show that the output power of the transmitter is higher than 350 MW and the noise figure of the receiver is lower than 3.0dB in the used band.