Abstract: As the productivity of tight sandstone gas reservoir in Sulige gas field after fracturing is not ideal, the difficulty on the transformation of low-pressure tight gas reservoir was analyzed, the capacity seepage model and capacity equation after transformation were established,the key factors of influencing the production after transformation were analyzed, and the production of two wells under different fracturing effect was compared. The results show that the tight gas reservoir fracturing of formation damage includes the damage caused by fracturing fluid itself and construction flowback technology, and the fracturing fluid flowback time impact on the low-pressure gas reservoir damage is bigger. The fracturing fluid with no residue and clean with low damage, and the quick-flowback technique after fracturing are the keys to improve the effect of lowpressure tight gas transformation.