With Ansai county as the target area and Participatory Rural Appraisal (PRA) as the main method, a survey was carried out on farmers'perception and acceptance of farmers' expectation for the cropland conversion program. The results show that the policy is not publicized and flexible enough to deal with the actual situation; and subsidies and technical guidance are also not enough. The authors give some suggestions on these problems, of which farmland construction and technical investment are very important to the conversion of slope farmland to forest or grass land.