An overlapping Y loop element Frequency Selective Surface(FSS) based on traditional Y loop elements was designed to delay the high harmonics of FSS in a working band and to achieve the single-pass band filter.By using the spectrum domain approach, the new element was analyzed and compared with the traditional Y loop elements.The affect of different incidence angles on the center frequency , -3 dB bandwidth and the limitation ability for the high harmonics under TE and TM incidence waves was discussed. The results show that the new element FSS owns the good stability under different incidence angles and polarizations. In the same resonant frequency of 17.6 GHz,the overlapping Y loop element possesses the narrower bandwidth than Y loop element, and its high harmonics delays for 6.5 GHz. When the length of the arm grows from 2.78 mm to 3.18 mm, the center frequency descends from 17.6 GHz to 14.1 GHz; When the width of the arm grows from 1.1 mm to1.5 mm, the center frequency rises from 17.6 GHz to 20.6 GHz and the bandwidth is widened at the same time.Furthermore, when the space between the elements increases from 7.2 mm to 8 mm, the bandwidth narrows down from 4.5 GHz to 3.5 GHz with a stable center frequency. The overlapping Y loop element FSS was tested in a microwave darkroom.By comparing with a calculation, the measured curve is good agreement with the calculated one.Obtained results show that the overlapping Y loop element can delay high harmonics in good stability for incidency angles and polarizations and provides a new idea for achieving the single-pass band filter in the working band.