Abstract: The tight reservoir of Sichuan Shaxi Temple layer has characteristics of extremely low porosity and low permeability, and the fracturing process requires to pump slickwater with large emission to form complex fracture networks in formation, then pump gel fracturing fluid to create main fracture and form a large volume of connective fracture network. Due to the composite application of polyacrylamide slickwater and low molecular guar gum fracturing fluid, a mixed fracturing fluid technology of "slickwater + crosslinked gel" has been developed, which is suitable to Shaxi Temple reservoir in Central Sichuan. Slickwater has characteristics of low friction and high clay stable performance, crosslinked fracturing fluid has characteristics of excellent shear resistance and low core damage, and the mixed fracturing fluid has good demulsification performance and high flowback rate. Field test results show that "slickwater + crosslinked gel" technology has good effect of reservoir stimulation, which was successful applied in G36 well, G117 well, the drag reduction rate reached 61.5%~64.8%, flowback rate was more than 40%, interface of the flowback fluid and the oil is clear and testing oil production achieved 45.1t/d.