The utility model discloses a tunnel firefighting system using slope surface running water and road surface water as a water source. The tunnel firefighting system comprises a drainage ditch, a longitudinal drainage ditch, a side ditch, transverse drainage pipes, a road surface riffle groove, intercepting and drainage ditches, a water filtering pool, a sand sediment trap, a low-level water pool, a pump room, a high-level water pool and a tunnel fire hydrant, wherein the water filtering pool, the sand sediment trap, the low-level water pool, the pump room, the high-level water pool and the tunnel fire hydrant are built near a tunnel. The slope surface running water and the road surface water are used as the water source, in this way, it can ensured that accumulated water in a water accumulating pool is sufficient, and meanwhile the cost is lowered; the intercepting and drainage ditches are built on multiple contour lines of a slope and used for collecting the rainwater on the slope surface, in this way, the water source is collected more conveniently, and the cost is low; meanwhile, the road surface water is used as the water source for supplementing the slope surface running water, and then the water source has more sufficient water; through arranging the low-level water pool, the pump room and the high-level water pool, water pressure can be automatically provided for the tunnel fire hydrant.