In this paper

a method to evaluate the in-flight MTF（Modulate Transfer Function） of the WFI（Wide Field Imager） on CBERS-02B is presented and the WFI images are restored.The CCD is another payload on CBERS-02B with high spatial resolution.Using the CCD images as high resolution images

the two-image comparison approach is applied to determine the MTF of the WFI with a pair of images acquired over Beijing on Nov.10

2007.As the results

MTF values in three directions are derived.The MTF values at Nyquist frequency in cross-track

in-track and 45° directions were respectively about 0.43

0.52 and 0.35 for red band and 0.30

0.46 and 0.36 for near-infrared band.Image-derived MTF values are applied to calculate the half bandwidths of the WFI.The results indicate that the instant fields of view of the WFI in the cross-track

in-track and 45o-track directions were respectively 1.188 pixels

1.165 pixels and 1.281 pixels for red band

and respectively 1.258 pixels

1.195 pixels and 1.326 pixels for near-infrared band.Weiner filter model is used to perform the MTF compensation for WFI images.The re-sults show that the restored image seemed clearer and contained more detailed information.