Abstract: The ecological thought of undergraduates of pratacultural science speciality in 5 grades was investigated. It was found that the undergraduates needed the ecological knowledge of grassland,but the ecological education, consciousness and understanding was poor. Aiming at the reasons that the teaching practice contents arranged on the basis of course system were inconsistent and the ecological though culture was poor, some measures were put forward, such as runing through the ecological education in the course teaching of pratacultural science speciality, culturing the ecological thought in the practice of field teaching and the abilities of observing and solving question independently.