In order to block the straight-through water channeling fractures of Honghe Chang 8 reservoir，gels with different gelling time and strength were prepared by using partially hydrolyzed polyacrylamide G3515 as gelling agent，water-soluble phenolic resin as cross-linking agent，and ammonium chloride as catalyst. The stability，injection and plugging capacity of gel was evaluated. The results showed that the stability of the gel was good. The elastic modulus of the gel prepared by 0.5% G3515，0.5% water-soluble phenolic resin，0.2% catalyst and 0.3% nanoparticle QC-W after placing 180 days at 70℃ was greater than 10 Pa. The injection of jelly was good，and the viscosity of the gel-forming solution at 70℃ was less than 500 mPa·s. The blocking ability of the gel was good. The breakthrough pressure gradient of the strong gel containing 0.8% G3515 in a thin tube with a diameter of 0.7—1.8 mm was above 4 MPa/m，and that of the weak gel containing 0.3% G3515 in a thin tube with a diameter of 0.7—1.5 mm was above 1 MPa/m，which met the requirement of large dose injection in Honghe oilfield.