Abstract: The Songnen Plain is a concentrated distribution area of soda saline-alkali soil.The soil salinity is mainly composed of Na2CO3,NaHCO3and other carbonates.Soda saline-alkali soil has the disadvantages of high pH,poor physical properties,salt accumulation on the surface and poor soil permeability,and soda saline-alkali soil is a typical low-yield soil in China.Planting rice is one of the most effective ways to improve saline-alkali soil in Songnen Plain.This study briefly introduced the distribution and characteristics of saline-alkali soil in Songnen Plain,and discussed the necessity and urgency of transforming paddy field in saline-alkali soil of Songnen Plain.The basic standard of paddy field preparation in saline-alkali land in Songnen Plain,the construction of irrigation and drainage canal system,the methods of paddy field preparation in newly reclaimed saline-alkali land and old saline-alkali land,and the methods of paddy field rake in saline-alkali land were summarized.The existing problems and development suggestions of rice cultivation and land preparation in saline-alkali soil of Songnen Plain were analyzed.