本文科学地分析了松嫩洪灾成因、特征，认为主要原因是：（１）多年未遇的强降雨；（２）上游森林破坏，水土流失；（３）中游湿地围垦、退化，洪水调蓄能力降低；（４）下游河床顶托；（５）水利工程太少。并由此提出一整套减灾防灾对策。 This paper scientifically analyzed the causes and characteristics of Songnen floods, and concluded that the main reasons are: (1) heavy rains that have not been encountered in many years; (2) destruction of forests and soil erosion in the upper reaches; (3) reclamation, degradation and flood storage capacity Lower; (4) downstream river bed support; (5) water conservancy projects too little. And put forward a set of disaster mitigation and disaster prevention measures.