We demonstrate a simple spectral-domain polarization-sensitive optical coheren ce tomography (SD-PSOCT) using a single line-scan camera based on a high-speed light switch.A 1×2light switch splits the reference bea m into dual arms,and orthogonal polarization light rays are constructed by a qua rter-wave plate (QWP).The reflected horizontal and vertical polarization light rays are delivered via an optical switch to a single spectrometer by turns .The relative reflectivity and retardance information are available by recombining the two orthogonal polariza tion images.This approach does not require additional intricate devices or algorithms to separat e the orthogonally polarized images and can eliminate the crosstalk between the orthogonally polari zed light by independent detection.We obtain the PSOCT image of a chicken feet sinew sample in vitro.Th is system can be employed to acquire high speed polarization-sensitive OCT images.