Due to the complex and changeable geological conditions of the soft coal seam, sticking accidents often occur during the drilling construction of the drilling rig, which greatly reduces the work efficiency and seriously threatens the personal safety of workers. In order to solve the above problems, the influencing factors of sticking are analyzed, the rotary pressure of drilling rig is used to describe the state of sticking, and the threshold of slewing pressure sticking is set. According to the working principle of drilling rig and sticking mechanism, the anti-sticking hydraulic circuit based on the Load Independent Flow Distribution System(LUDV) is established, the automatic anti-sticking controller is established by PID and signal selector, and the Seeker Optimization Algorithm(SOA) is used to adjust PID parameters. The system simulation test is carried out by using AMESim, and the results show that when the rotary pressure reaches 200bar, the drilling rig automatically pulls back; when the rotary pressure reaches 220bar, the drilling rig slewing pressure remains stable and a large slewing power is maintained to overcome the external load resistance and avoid sticking accidents, which verifies the effectiveness of the automatic anti-drilling electro-hydraulic control system.