“…Since Gause et al [3] and Maynard Smith [4] introduced a quantity x R of the prey that involves refuges, the concept of prey refuges has attracted the attention of ecologists and mathematicians because it exists extensively in predator-prey communities. A lot of literatures showed that prey refuges have significant effects on the population dynamic (see [5,6,7,8,9,10,11,12] in detail). Incorporating prey refuges in the above system, system (1.1) turns into…”