The solar flare is usually erupted continuously. The fast jets interaction are the mysteries for the solar physics community. In this environment, it is wondering if there is the termination shocks interaction and how to work on the particles acceleration. In the present work, we chose one solar flare event as an example to investigate the probable association with the termination shock collisions. We use a dynamic Monte Carlo method to examine the energy spectrum with the relevance to the twin flare event. In the twin-flare shock scenario, the thermal energetic particles in the fast jet pushes into the top of the loop for twin-shock formation and acceleration efficiently. As a result, we obtain the detailed energy spectra, structures with different behaviors at the related episodes of the twin-flare shock evolution. Therefore, we predict that there exists a more efficient twin-flare shock model on particles acceleration.