Abstarct: Predatory mite Amblyseius swirskii (Athias- Henriot) is one of the natural enemies of pests such as spider mite Tetranychus urticae (koach). The public predatory carnivorous predators that addition prey also needs to pollen fore complete the growth and reproduction. The use of pollen as a food supplement or alternative food in the diet can to be increase the efficiency of the predatory mite in biological control programs. For the effects in this study effects of different diets on biological parameters predatory mite A. swirskii has been studied, 6 different diet includes: soybean pollen, walnut pollen, date pollen, sesame pollen, apricot pollen and eggs of spider mite were examined. To study the biological parameters of the predatory mite A. swirskii two separate experiments were conducted, First stages of maturation of the egg to adult for any diet separately in 65 replications. Different stages of predator were recorded daily at a time (8 am) until the last mite. In the second experiment 65 pairs of adults (male and female) were tested separately for each diet, the oviposition and daily mortality at one time (8 am) to adult last death was recorded. Analysis of data on biological parameters baxsed on the theory of special bisexual life table – steps. Using MS- Chart software (version 2016). The results of both experiments showed that the predatory mite A. swirskii able to grow and development on each of six tested diet, But less time to grow from egg to adult mites on soybean pollen (13.83± 0.92days) and most of the Apricot pollen (16.82± 0.78 days) was observed. Less time to grow and development in the deutonymph stage on soybean pollen diet (1.03± 0.02 day) and the most time on the date pollen (2.07± 0.04 days) were observed. Most of the oviposition period on date pollen (5.7± 0.15 days) and the highest fertility on Walnut pollen (4.43± 0.41 days) was observed. Comparisons of biological parameters between different diets showed intrinsic rate of population increase (r) is not significantly different among the variation diets, but soybean pollen showed the highest r value. There are was not significantly different between reproductive rates (R0) of diets but most of it is related to soybean pollen. The average length of a generation from egg to egg feeding on different pollen (date and walnut, P = 0); (date and sesame, P = 5.400); (date and soybean, P= 5.400); (apricot and walnut, P = 0.0001); (apricot and soybean, P = 0.00002); (spider mite eggs and walnut, P = 0.0001); (spider mite eggs and sesame, P = 0.00002) and (spider mite eggs and soybean, P = 0.00002) showed significant differences at the level of 5% and less time to reach maturity and is the first eggs was in soybean pollen diet. Length of survival between the treatments (apricot and sesame, P = 0); (apricot and walnut, P = 0); (apricot and spider mite eggs, P = 0); (apricot and soybean, P = 0); (date and sesame , P = 0); (date and walnut, P = 0) and (date and spider mite eggs, P = 0) were significantly different at 5% level. The results showed that pollen can be increase the oviposition and survival time of the predatory mite A. swirskii and increase the efficiency of predatory mite in programs of biological control.