Abstract: In order to build a water-saving and ecological campus,taking the main teaching area of Northeast Agricultural University as an example,according to the construction status of the old teaching area,the paper designed the indirect use of rainwater in the first teaching area and the direct use of rainwater in the second teaching area.The design and renovation of the sunken green space in the first teaching area was carried out to make the rainwater fully penetrate into the ground to conserve water resources.The second teaching area was designed to collect and use the rainwater collection,transmission,purification and storage and other engineering facilities,including the roof,square road and green space.The design of water-saving green space on campus could provide design basis and practice for the construction of water-saving green space in colleges and universities.