<p>Unevenly distributed residual stress remains after the casting of the shearer rocker arm housing. This study aimed to avoid the potential impacts of these residual stresses on the manufacturing quality and service safety of the rocker arm housing. Specifically, a method for residual stress regulation was designed through liquid wave vibration (LWV) based on the principle of alternating flow. The experimental system for this method was also presented. First, the residual stress distribution profile of the rocker arm housing was obtained through casting formation simulation and experimental testing. Subsequently, the principle of the liquid wave vibration residual stress regulation system (LWVRSRS) was introduced. The vibration characteristics of the LWVRSRS were acquired through AMESim simulation and experimental testing. Afterward, a co-simulation model was established to analyze the effectiveness of the LWVRSRS in relieving casting residual stress within the rocker arm housing. Finally, the residual stress regulation method was subjected to experimental validation. The experimental results demonstrate that the maximum residual stress value of the rocker arm housing after casting was 517.8&#xa0;MPa, with residual stress values primarily distributed between 0 and 150&#xa0;MPa. After LWV, the maximum residual stress relief rate for the rocker arm housing reached 51.99%, and the average stress relief rate was approximately 27.75%. The LWVRSRS exhibited stable vibration characteristics and a rational structure. The implementation of the LWVRSRS effectively weakened the residual stress in the rocker arm housing of a shearer, thereby opening new avenues for casting residual stress relief in large-scale components.</p>