The purpose of this study is to address the issues of slow response speed and low precision associated with a 4-support launching platform levelling process, as well as the phenomenon of false support during the levelling process. To this end, an improved dung beetle optimizer (IDBO) driven launching platform levelling control method is proposed. Firstly, a dynamical model of launch platform levelling is established. And then, a dynamically decoupled electric servo PID levelling control method is designed for each leg, based on the principles of center invariant and four-point coplanar. The IDBO algorithm is employed to adaptively tune the PID controller parameters. A simulation test is implemented in Matlab and Simulink, and test results demonstrate that the PID levelling control method driven by IDBO exhibits superior performance in terms of response speed, precision, and robustness compared to the generic PID control method.