[Aim] To provide a basis for biological control of the Western flower thrips, Frankliniella occidentalis, the functional response of the predatory mite, Amblyseius swirskii on F. occidentalis as prey was studied under different temperatures.[Method] The predation of A. swirskii to F. occidentalis was studied by water agar in laboratory.[Result] The mean daily consumption of 1st instar of F. occidentalis protonymph increased with the increase in temperature, but decreased when the prey was deutonymph, adult male and female. The functional response of A. swirskii female adult mites on 1st instar of F. occidentalis could be described with Holling-Ⅱ equation, and the maximum feeding amount was 18.146 prey items/day at 30℃. At the same prey density, searching rate of A. swirskii female adult mites to 1st instar of F. occidentalis increased with the increase of temperature; but decreased at 35℃. The intraspecific competition by A. swirskii adult females was scrambling competition.[Conclusion] A. swirskii had a good predation potential against F. occidentalis, and the species is a promising biological control agents of the Western flower thrips.