For the stealth technology, in order to overcome the limitations of thin-layer plasma for electromagnetic (EM) waves attenuation and further broaden the RCS reduction band of the metasurface, the plasma based checkerboard metasurface composed of plasma and checkerboard metasurface is investigated to achieve better radar cross section (RCS) reduction (RCSR). We designed a checkerboard metasurface which can achieve abnormal reflection to reduce RCS and whose -10dB RCSR bandwidth is from 8.1 GHz to 14.5 GHz, the RCSR principle of it lies in the backscattering cancellation, which depends on the phase difference of artificial magnetic conductor (AMC) units. The designed plasma based checkerboard metasurface is a thin composite structure, including a checkerboard metasurface, a plasma layer, and a air gap is between them. Full wave simulations confirm that the plasma based checkerboard metasurface’s -10dB RCS reduction bandwidth and RCS reduction amplitude are both increased under different polarized waves compared with the only single plasma or the only metasurface. We also introduced the reason and mechanism of the interaction between plasma and checkerboard metasurface to improve the RCSR effect in detail. And as it doesn’t need too thick plasma required for plasma steath, its application in practical scenarios is easier to implement. Keywords: abnormal reflection, stealth technology, plasma based checkerboard metasurface, radar cross section reduction (RCSR)