Aiming at the problems of incomplete gel breaking and low flowback rate of fracturing fluid after fracturing in shallow low-temperature oil and gas well，the optimum reaction parameters of three autogenous heat generation systems，including nitrite and ammonium salt，chromium trioxide and glucose，and hydrogen peroxide were selected. Under the reaction parameters，the heat generation of three systems and their influence on gel breaking performance of fracturing fluid were analyzed. The results showed that the best reaction parameter for nitrate and ammonium salt system was obtained as follows：2 mol/L activator HCl，8 mol/L heat generating agent NaNO₂ and NH₄Cl（molar ratio 1∶1）. That for chromium trioxide and glucose system was obtained as follows：1mol/L activator HCl，14% heat generating agent CrO₃ and C₆H₁₂O₆（mass ratio 1∶1）. That for hydrogen peroxide system was obtained as follows：0.3% activator MnO₂，30% heat generating agent H₂O₂. Hydrogen peroxide system had the highest heat generation，and the temperature could reach 91 ℃. In the gel breaking experiment of fracturing fluid，the adding sequence of glucose and chromium trioxide system and gel breaker ammonium persulfate had no influence on gel breaking effect of fracturing fluid. The hydrogen peroxide system should be added with gel breaker at the same time. However，for the nitrite and ammonium salt system，the gel breaker was added after the heat generation system. The nitrite and ammonium salt system was the best additive for gel breaking system of fracturing fluid and had the best gel breaking performance，which could reduce the viscosity of fracturing fluid to less than 6 mPa·s.