In order to solve the problem of slow response and low control precision for the traditional self-balancing platform,a six degree-of-freedom self-balancing platform is designed based on EtherCAT bus.Six servo drivers that support EtherCAT communication drive six electric cylinders to stretch contraction.The inclination data of the platform is read by the gyroscope and transmitted to the main station through EtherCAT.And the platform is accurately controlled by using the active disturbance rejection control (ADRC) algorithm.Experimental results show that the designed platform has the advantages of low latency and high anti-interference ability.