Electro-hydraulic servo control system has a typical large delay, nonlinear and time-varying characteristics, which is Controlled effectively by using ADRC. To optimize the parameters of ADRC quickly, the paper presents a new ADRC structure of configurable zero point, and analysis the effect of strong interference on the extended state observer, and proposed the selection conditions of ESO parameter. Experiments show. This design can effectively improve the response speed of the system and simplifies the tuning process parameters.