Abstract: In order to optimize the process parameters and evaluate the effect of composite the electrothermal -chemical shock wave technique, testing with massive concrete samples was carried out. The first stage involved determining its rock breaking capacity and then the technique’s physical and theoretical constraints. Next, a numerical simulation model under strong dynamic loading was established to simulate the test. Finally, the sensitivity of impact frequency, peak value, elastic modulus of rock and the in-situ stress were evaluated using a numerical model to determine the effect of stimulation. Thus, the influence law of each process parameter on the number of fractures and active distance were analyzed, and the effectiveness of the stimulation was predicted. The experimental results demonstrated that the composite electrothermal-chemical shock wave technique could extend the pulse width of conventional electric pulse by roughly 1.5 times and increase the shock amplitude by around 3.0 times. In addition, four macroscopic fractures were generated in the rock sample after 6 shocks. The effect of composite electrothermal-chemical shock wave technique was evaluated and would provides theoretical guidance for the improvement of reinforced reservoir stimulation using this technique.