The application of filter technology is the key to the reproduction of measuring spectrum of light source by means of Fourier Transform Spectrometer. Chebyshev bandpass filter was designed by the use of second order sections existing in continuous time active filter Max274 and standard resistors. A good agreement was found between the performance of actual 16 order bandpass filter and the result of primary design. This kind of bandpass filter can be used to limit the measuring frequency width according to practical requirement. It can also availably reduce the influence of AC electrical signal coming from mercury lamp source with AC power source in the course of measuring and singal processing of Fourier transform spectrometer.