The sloping plate tank was used to treat domestic sewage under SBR operation conditions. The practical performance of nitrogen removal of Lou soil sewage from Guanzhong was investigated. The results show that the Lou soil''s volatile matter of the system and nitrification strength are 0.0658and 19.35mg/(g·h) respectively；ammonia nitrogen adsorption removal rate is less than 25%,and nitrification to bacteria is the main way to removal ammonia nitrogen. The removal rates of the sewage''s ammonia nitrogen and TN are 87.93%, 70.5% for the system under the certain hydraulic loading and pollution loading. It is clear that the extensive use of Lou soil system in Guanzhong area so as to realize purification of nitrogen in distributed sewage is practical and feasible.