To conserve and utilize natural enemies for comprehensive control of pests in peach orchards, the quantity, time and space framework of Myzus persicae, Empoasca flavescens, Tetranychus viennensis and their predatory natural enemies in the spring-summer seasons of 2008 and 2009 were studied using grey system analysis, ecological niche analysis and aggregated-intensity index analysis of spatial patterns. The synthetic ranking results indicated the orders of main natural enemies of the three pests in the spring-summer seasons were: Myzus persicae: Epistrophe balteata, Harmonia axyridis, Misumenops tricuspidatus; Empoasca flavescens: Misumenops tricuspidatus, Tetragnatha maxillosa, Erigonidium graminicola; Tetranychus viennensis: Erigonidium graminicola, Theridion octomaculatum, Misumenops tricuspidatus. The order of main natural enemies in 2008 autumn were: Myzus persicae: Theridion octomaculatum, Chrysopa Sinica, Tetragnatha maxillosa; Empoasca flavescens: Erigonidium graminicola, Tetragnatha maxillosa, Epistrophe balteata; Tetranychus viennensis: Theridion octomaculatum, Harmonia axyridis, Chrysopa Sinica. The numbers of pests and their natural enemies showed no significant difference between the two years.