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How to maintain the long-term stability of the measuring data is one of the problems that exists in the field of space optical radio measurement ,based on the requirement of the space cryogenic absolute radiometer’s calibration, a design of halogen tungsten lamp driver which’s maximum output current reaches 3A, voltage up to 12V , and stability within one thousandth of the full current output range is given in this paper. The performance and architecture of other DC output current sources are investigated and summed. Features of two different kinds of circuit topologies are compared and the linear topology is selected. Providing an analysis of factors that will affect the circuit’s performance, a hardware testing environment is established to test the hardware. The result shows that the design meet the requirement of halogen tungsten lamp driver.