Oil-way cooling system of small walk-behind road roller

The invention relates to an oil-way cooling system of a small walk-behind road roller. The oil-way cooling system is composed of an overflow valve, a two-position four-way reversing valve, an oil motor, a water sprinkling tank, a heat radiator, an oil tank, a filter and an oil pump. Oil ways are divided into an oil inlet way and an oil return way, an oil inlet line sequentially is the oil tank, the filter, the oil pump, the overflow valve, the two-position four-way reversing valve and the oil motor, and an oil return line sequentially is the oil motor, the two-position four-way reversing valve, the heat radiator and the oil tank. The oil-way cooling system is characterized in that the oil return way is installed in the water sprinkling tank so as to pass through the water sprinkling tank between the oil motor and the oil tank, and the heat radiator is installed on the oil return way in the water sprinkling tank. The oil-way cooling system has the beneficial effects of simple structure, strong practicality and wide commercial application prospect.