Enterprise cluster is similar to the biological ecosystem, a lot of similarities are exhibited between species co-existence in nature and enterprise cluster in economic life. In view of this fact, predator-prey model, from biology, is applied to describe dynamically the process of enterprise cluster interactions though the output variable ratios between upstream enterprise and downstream enterprise. By applying the differential inequality, we study the permanence of following nonautonomous delayed enterprise cluster predator-prey model with Ivlev functional response and feedback control
