Abstract: Sweet potato production mechanization technology is backward，and special equipment is short in the suburb of Beijing.Most sweet potato ridgers were simple ridgers，or other ridging machine replaced.Their ridging quality was poor，ridge was not uniform，so as to effect sweet potato growth and cause land waste.Adaptability test of sweet potato ridger was carried out in order to select suitable sweet potato ridging operation models in suburb of Beijing.3 ridging machine of sweet potato for 1-QL，1-GQL-2 and 1-GKN-2 were selected to test.Test results showed that 1-GQL-2 and 1-QL could meet the requirements of standard，1-QL was suitable for small area land operation and 1-GQL-2 was suitable for large-scale land operation.