Aiming at the problem that the commonly used jelly fracturing fluids are difficult to resist high temperature and strong shear at the same time，a self-healing fracturing fluid（SHFF）based on dynamic covalent bonds was designed. The shear resistance， temperature and shear resistance，viscoelasticity，sand carrying capacity and gel breaking performance of the fracturing fluid were studied. The results showed that the dynamic covalent bond crosslinking SHFF could be dynamically healed under high-speed shear，and had the characteristics of dynamic reversibility，exhibiting good self-healing function. The viscosity of thickener base fluid of SHFF was low，which was beneficial to pump injection. After shearing for 3 min at 170 s-1 and then standing for 1 minutes for 3 times，the viscosity retention rate reached up to 97.6%，and the viscosity retention rate reached up to 65.7% after shearing at 170 s-1 for 2 minutes and then standing for 1 minutes followed by shearing at 510 s-1 for 2 minutes and then standing for 1 minutes for 3 times. The viscosity retention rate reached up to 99.6% when sheared at 170 s-1 for 2 h at the temperature of 120℃，which indicated that the SHFF had excellent temperature and shear resistance. In the range of 0.1—10 rad/s linear viscoelastic zone，the elastic modulus G' of the SHFF was always higher than the loss modulus G" of the SHFF. The SHFF had good sand-carrying performance，which was 75% higher than that of guar gum fracturing fluid. The residue content was nearly zero after the SHFF was broken，which indicated that the broken fluid had little damage to the formation and was easy to be flowed back. It is feasible to apply self-healing gel to fracturing fluid，and it also provides a new idea for the further research and development of fracturing fluid.