Infiltration is one of the important processes in irrigation management. Different equations have been developed for infiltration. One of them is related to NRCS (SCS) as intake family, which has been revised for surface irrigation recently. However, initial moisture as an effective factor on infiltration did not introduced in the new equations. This research was focused on assessing the effect of initial water content on calculated infiltration by revised NRCS equations. For this purpose, a completely randomized design including 9 plots (three treatments and three replications) was established. For making of different initial water contents, each plot was irrigated five times at internals of 5, 7 and 9 days. Each plot was including three furrows with length of 30m and width of 60cm. The first and third furrows were as tributary ones to be created actual conditions of field. The base infiltration rate was estimated base on the texture an also using four approaches including: 6 hours intake rate, simple power equation, terminative fitness and inflow- outflow method. Results show that the base infiltration is function of method of its determination and initial moisture, so that the least effect of initial moisture on base infiltration was related to inflow-outflow method. Although the effect of initial moisture on depth of infiltration was not significant for all of the methods in different time step, the calculated depth of infiltration using the different methods had a significant difference together. Keywords : Furrow irrigation, infiltration equation, by revised NRCS equations, Initial soil moisture