A new color interpolation algorithm of CCD is put forward in the paper.In Bayer pattern,the green components are the twice as much as red or blue,and contain more information,which can be reference of color interpolation of R and B.Based on this principle,we compute green components first using median interpolation algorithm,then make interpolation of Red components and Blue components according to distributing of green components.The experiment results show that this algorithm is able to reduce image blur problem caused by linear interpolation.