FSS is a crucial approach to realize the wave-transparent and stealth performance of randome. Based on the research and practice results of the electric performance of domestic and foreign FSS randome, reseach and analyze of the electric performance problems involved in the wave-transparent and stealth technical indicators of the FSS randome, some ways are put forwarded to deal with the design of the wave-transparent and stealth performance. It points out that the choice of small unit,close cycle and the choice of reasonable randome struc