The flight height measurement and control is the main implementation unit of the dual-mode Seeker to carry out the Guidance of the target and the telemetry of Navigation state. In view of the existing defects and Seeker measurement of height tends to be small, intelligent and standardization requirements, design and implementation of a atmospheric pressure acquisition, temperature compensation, pressure filter, pressure-height conversion, and data real-time synchronization measurement of longitude and latitude to The height positioning system, which has the low power consumption and low cost, the pressure-high conversion rate and high precision, stable and reliable output data. After a comprehensive performance test of flight control and Attack effect test of simulated target in the field results show that The height positioning system measured data accuracy and real-time meet The dual-mode Seeker development needs.