The utility model discloses a single-ring soil initial infiltration meter, which comprises an infiltration ring, which is composed of two semi-rings detachable and connected, and also includes a ring-hitting device. The ring-hitting device comprises a bottom plate, which can cover the connected infiltration ring, and one side of the bottom plate is vertically provided with a stricken column, and the stricken ring device comprises a bottom plate which can cover the connected infiltration ring. The column axis coincides with the center of the bottom plate, and the other side of the bottom plateis provided with a positioning mechanism for fixing the bottom plate when it is placed on the infiltration ring. The utility model can uniformly transmit the impact force to the infiltration ring, reduce the vibration or deviation caused by the infiltration ring when it is smashed into the soil, reduce the gap between the soil and the ring, reduce the damage to the soil structure, reduce the influence of preferential flow on the initial infiltration rate of the soil, and improve the soil water. The accuracy of infiltration measurement provides more powerful technical support for the effectiveutilization of crop water.