Abstract：Abstract: This paper aims at exploring the algorithm of g7 by processing the data from FG5 and A10 absolute gravimeters. When the observation equation and algorithm offered by the the software user manual is used to process the A10 data, the difference between the results of the designed program and the g7 software is less than 3 μGal. However, for the FG5 data, the difference is too large to accept. After correcting the observation equation and time observations, the latter is within －0.1—0.1 μGal. We believe that the models and algorithms mentioned in this paper are same as those used in the g7 software.