This paper studies the logic and theoretic basis of Marx’s value theory of living labor, and how to verify its validity in practice, and its special contributions in the history of economics thoughts and the communist movement.

A Correct Understanding of Labor Value Theory in Knowledge Economy;

Based on three theses for oral examination of professor YAN Zhi-jie, this paper puts forward questions and discusses the problems of whether or not the reform in China is contradictory to the basic principles of Marxist labor value theory and whether or not the concrete application range of labor value theory is the application range for labor value theory.

Marx labor value theory is the foundation of Marx political economics.

Probing into Jinan s Revenue Distribution Mechanism Based on the Theory of Labor Value;

Marxs theory of labor value aims to judge the efficiency of the capitalist mode of the production.

Strengthing the understanding of labor and the th eory of labor value should base on the reality of socialist market economy construction,develop and complete the theory of labor and labor value,but not to deny the theory of labor value.

As the cornerstone of Marxist political economy,the theory of labor value should keep up with times.

Marx s basic principle on the theory of labor value has scientific and practical characteristics.

Re-understanding the theory of the value of labor;

Based on the materialistic historical principle that there is twoness in the society,he discovered the theory of the twoness of labor,having answered all the questions which are unanswered by the theory of the value of labor in the classical political ecom.