Based on the Y element, a novel element for the Frequency selective surface (FSS) is presented in this paper. The transmission characteristics of Y element FSS and the novel element FSS is calculated using Galerkin's method in the spectral domain, and the optimum parameters of the FSS is obtained. The corresponding equivalent FSS sample plate was fabricated. It's transmission characteristics were measured by microwave network analyzer at 8—12GHz. The agreement between the calculated and measured values was good. The results show that, the novel element FSS has excellent transmission characteristic at large-angle incidence, the transmission coefficient is -052dB at TE 66° incidence. From 0° to 66° TE incidence, the drift of the resonant frequency is 200MHz. Meanwhile the transmission coefficient of Y element FSS is -082dB at TE 66° incidence, and from 0° to 66° TE incidence, the drift of the resonant frequency is 400MHz. Therefore, the novel element FSS is more suitable than Y element FSS for the application in large-angle incidence curved streamlined radome.