JPEG2000 compression algorithm has broad applications in the field of satellite remote image compression. However

the lifting coefficients of CDF9/7 are a group of irrational numbers

which result in complex computation and require vast storage directly used in lifting algorithm

plus a fixed point method is needed. The existed fixed point implementation methods of CDF9/7 can solve the problem of computation and storage

but they degrade the quality of the reconstructed image. In order to solve this problem

a fixed point implementation method of LS9/7

based on constructing LS9/7 wavelet bases and adopting post scaling method

is proposed in this paper. Compared with two fixed point implementation methods of CDF9/7

the complexity of computation has been decreased by 34% and 28.3% and the quality of reconstructed image has been improved by more than 3db. Its performance is very close to the float point implementation of CDF9/7.