The invention relates to a water cooling oil-free spindle nose sealing structure for a horizontal type concrete stirrer. The water cooling oil-free spindle nose sealing structure comprises at least one oil-free spindle nose, a water supply device, a water control pipeline and an annular water cooling channel arranged on the oil-free spindle nose. The oil-free spindle nose comprises a rotating shaft, a rotary protective ring, a sealing assembly, a spindle nose shell and a reinforcing plate, wherein the rotating shaft stretches into a stirrer chamber, the rotary protective ring is arranged on the rotating shaft, the sealing assembly is arranged at the front end of the rotary protective ring, and the spindle nose shell is arranged on the outer ring of the sealing assembly. According to the water cooling oil-free spindle nose sealing structure for the horizontal type concrete stirrer, by the adoption of the water cooling way of the annular water cooling channel, the temperature which rises due to the fact that heat is generated by rotary friction between a static sealing ring and a rotary sealing ring is effectively lowered, the service life of the oil-free spindle nose is prolonged, water cooling of the annular water cooling channel plays a role in washing the rotary protective ring, the sealing assembly, the reinforcing plate, a first spindle nose shell and a press seal, and the problem that the internal structure of the spindle nose is damaged after scale is formed on slurry; due to the fact that no lubricating grease is needed, the stirred concrete is not polluted, and the concrete quality is ensured.