Coal mine underground water-glycol fire-resistant hydraulic fluid is prepared based on ethylene glycol as the main component, compounded with lubricants, rust inhibitors, viscosity improvers, defoamers, and other additives. It does not burn in the manifold fire resistance test (704°C), solving the flammability issue of traditional hydraulic oils. Its performance indicators such as lubricity, viscosity index, rust resistance, and air release value meet the standards of mineral oil-based hydraulic oils, making it a substitute for traditional hydraulic oils. It is mainly used in hydraulic systems such as coal mine underground vehicle operation systems, belt tensioning mechanisms, roof bolter drills, and tunnel drills, and is also suitable for hydraulic equipment in metallurgy, casting, and other industries. This product possesses the following technical characteristics: 1. It is a transparent and uniform fluid, non-flammable; 2. It exhibits stable performance, excellent lubrication, and rust-preventative properties; 3. It has a high viscosity index, providing good adaptability to rubber seals; 4. It is environmentally friendly and non-irritating to human skin.