Abstract: The soil alkali-hydrolysable nitrogen content was determined generally using alkali solution diffusion absorption in the past, this research was aim to use Germany＇s GERHARD kjeldahl nitrogen determination of distillation soil alkaline hydrolysi, and improve kjeldahl nitrogen determination distillation, the appropriate time and distillation efficiency was determined, compared with the traditional alkali solution diffusion method, the measured results more accurate, higher intensity, and easy to operate, to save time. It provided a rapid,accurate and efficient measurement method for determination the soil alkali-hydrolysable nitrogen content.