Mao Zedong,in his comments and talks on Stalin's The Problem of Socialist Economy in U.R.S.S. in 1958 and talks on Political Economics Textbook (volume 2) of Soviet Union during 1959-1960,discussed the objectivity,knowability of socialist economic law,and the purpose of understanding objective economic law,and expressed a series of unique views on the law of the unity of opposites,the law that relations of production must conform to the level of productive forces,the law of planned and proportionate development and wave mode development,socialist commodity production and law of value,socialist economic law is historical law and so on. These views are of significance both in theory and practice.