For the safety of the drilling rig, an explosion-proof cable gland that matches the type of explosion-proof equipment needs to be selected. According to the technical requirements of explosion-proof equipment, the explosion-proof cable gland shall be reasonably selected and installed according to its specific model, performance and components. Correct selection and installation can not only fix the cables, seal the inner and outer sheaths of the cables, and maintain the IP rating of the equipment, but also prevent flammable and explosive gases and dust from entering the equipment to cause an explosion, so that the explosionproof equipment in hazard can work continuously and stably.