Considering the importance of infiltration and necessity of waste water effluents usage for irrigation, effect of irrigation water quality and magnet technology on infiltration process was studied in “irrigation by bed”. To achieve this objective, three treatments including conventional water, effluent and magnetic effluent were considered and then a completely randomized design was carried out with four replications and five irrigation events. To evaluate the effect of the treatments on infiltration, two parameters including basic infiltration rate and average infiltration rate in three time intervals (two half-hour intervals and one hour interval), also coefficients of Kostiakov and Philip equations were taken into consideratio n. As expected, the basic infiltration rate was reduced in all treatments through the irrigation season. However, relative changes of basic infiltration for effluent treatment were less than the conventional water treatment, and magnetic field decreased the effect of effluent treatment so that the difference of the treatments became non-significant. Additionally, average infiltration rate analysis was relatively similar to what reported for the basic infiltration rate, but the differences were less significant. Also, statistical analysis showed that power of the Kostiakov equation, as an indicator of the stability of soil structure, has been decreased during irrigation season, in which the effluent treatment had the lowest descending trend, like the other parameters. Investigation ofhilip coefficients showed that sorptivity (S) of water treatment was more than effluent treatment, so it seems that irrigation with wastewater treatment reduces initial infiltration rate. However, steady-state infiltration rate (A) of water treatment was less than wastewater treatment, which indicates increasing of infiltration in the long time. Furthermore, magnetic treatment had no significant effect on these coefficients. Generally, in this study, using wastewater increased the volume of water infiltrated into the soil during the experiment time. Keywords : irrigation by bed, infiltration process, wastewater effluent, magnetic, coefficients of Kostiakov equation