R Rainwater that falls and is absorbed by the soil is called infiltration. Infiltration is the process of entering water into the soil in mm/hour and if the value of the infiltration rate is lower than the intensity of rainfall, it will result in water runoff which is the initial process. Erosion is a condition or event of loss of the top soil surface layer, due to water or wind. The negative impact of erosion itself causes a decrease in productivity and soil fertility in an area. This is very detrimental to people who live in the agricultural sector such as residents in Pencil Village and Seling Village. Pencil Village and Seling Village, The two villages are located in Karangsambung sub-district, Kebumen, Central Java. Infiltration rate analysis needs to be carried out in the area in order to determine the areas where runoff occurs in Pencil Village and Seling Village. The parameter value of the measured infiltration rate can be used to control the condition of the area where runoff occurs. This study uses a Double Ring Infiltrometer as a measure of the infiltration rate and with the Horton method, Philip method, Kostiakov method the value of infiltration capacity in aniarea can be calculated from the results of field measurements. The results of the second analysis of the calculation of the infiltration rate and rainfall intensity are compared and ai map will be formed showing the area where rain runoff occurs. The results of the processing will provide data on areas experiencing runoff so that recommendations can be given so that erosion does not occur in the area