Abstract: With the development of the modern advanced detection technology, the stealth technology needs to be constantly improved. The traditional stealth technology, radar absorbing material(RAM) has a stealth effect above 6 GHz of microwave. However, plasma stealth technology is easier to implement at low frequency (below 6 GHz). Based on this, this paper attempts to combine radar absorbing material technology and plasma technology, and use the plasma generated by coaxial grid glow discharge incorporation with the radar absorbing materials, and then test its stealth performance. The results show that the effect of composite stealth is better than that of single stealth technology, and the control of stealth technology is easier to realize by adjusting the parameters such as the discharge power of plasma. The work in this paper can provide some references for the research on the composite stealth technology of plasma and radar absorbing materials.