FW-5 is suitable for 3.5m×3.5m mine tunnels, with higher stability, easier operation and more reliable safety. Wet brakes are more suitable for complex and harsh underground working environments. This multifunctional service vehicle is equipped with a quick-change general chassis with different attachments functions. It can provide a safe and economical transportation system and operating platform for manpower, materials, fuel, etc., and can be slidably installed and dismantled with multifunctional series attachments.