In order to enhance the effect of acid fracturing and provide possibility for oil and gas production increase in oilfield,the dissolution rate, dissolution ratio,dissolution quality, permeability improvement rate and fracture conductivity of the FF⁃01 acid system to core were studied by means of dissolution and acid dissolution,with the core of Yanchang oilfield as the main source. The damage to the core and the corrosion of the pipe fittings were analyzed.In addition, the surface tension of the residual acid and the apparent viscosity before and after the acid reaction were investigated.The results show that 25% of the FF⁃01 environmental acid has a better corrosion inhibition effect,the permeability improvement rate of the core after treatment with FF⁃01 is 288%,and the conductivity of the core is enhanced. After the reaction with cuttings, the residual amount of FF⁃01 environmental acid is 1/6 of the amount of HCl residue.The corrosion rate of the FF⁃01 environment⁃friendly acid on steel and the surface interfacial tension after acid reaction and the viscosity of residual acid are all low,which meet the requirements of environmental protection.