Abstract: In the fracturing practice of shale gas reservoir in southeastern Sichuan, it is found that the fracturing operation of gas wells in complex tectonic zone is very difficult and the reconstruction effect is not ideal. In order to analyze and recognize the causes that affect fracturing operation in complex tectonic zone, and improve the success rate of construction and the effect of fracturing reconstruction, we use the data of fracturing curve, parameters, gas production profile test data and microseismic monitoring results to study the factors and influencing mechanism of affecting facturing reconstruction in depth, and put forward some pertinent measures for optimizing technological parameters. Good results have been achieved in field application, because the uniformity of fracture extension has been enhanced obviously, and the output has been greatly increased after pressing. It has made a positive attempt to improve the effect of shale gas reservoir reconstruction of the same type.