Increasing oil palm plantation in Indonesia since 2008-2011 in a range of 6,92%, that was 7.363.703 to 7.873.384 ha. Vegetation grown in an area of oil palm plantation is weed for its main crop. There is potential source of oil palm plantation area for livestock industry. Oil palm-cattle integration system is well known and it has been applied in many oil palm plantations, by the use of waste from oil palm plantation, oil palm by-product, the fronds for feed and feces from cattle as organic fertilizer for the plant. Management of oil palm plantation is costly, including for plant maintainance, weeding, providing organic and chemical fertilizer. Grazing system under oil palm would minimize cost problem and oil palm production input can be reduced. Oil palm-cattle integration by grazing that prospective system to be developed is rotation system. Types of plants under oil palm plantation consist of grasses, legumes, other narrow and broad leaves, some are palatable and some are unpalatable or toxic for cattle. Species of vegetation under oil palm vary among the plantation depending on the age of oil palm plant. Introduction of superior forage into oil palm plantation is promising effort to increase the production and quality of feed. Carrying capacity for cattle varies among the oil palm plantation and it depends on vegetation under oil palm plantation and age of oil palm. Studies showed that integration oil palm-livestock by grazing system has been proven economically feasible. Key words: Plantation, oil palm, forage, cattle, grazing