In this paper, an introduction of the auto-tracking parabolic sensing antenna with dual-modearchimedes-spiral feed is given. Theoretical analysis, calculation and experiment have also been made. Thetheoretical values tally with the measured ones. The results show that this antenna is suitable for remotesensing. In this paper, an introduction of the auto-tracking parabolic sensing antenna with dual-mode archimedes-spiral feed is given. Theoretical analysis, calculation and experiment have also been made. Thetheoretical values ​​tally with the measured ones. suitable for remotesensing