Starting by analyzing Marx s capital circulation principle,the writer of this present paper makes a research into the problems existing in capital circulation in China current economic development and raises some practical countermeasures.

The difference between capital turnover and capital cycle lies in studying the cycle of capital in term of periodicity rather than the times of capital cycle.

The article expounded the substance of the capital cycle and the process of the market economic move.

The total formula of Marxian capital circulation is G-W…P…the W -G , it from whole up expressed the currency capital, produce capital and the merchandise capital through mutual contact of a series and with each other for conditional conversion but continuously circulating the process of the back and forth.

And then this paper deduces the capital circulation formula of the profit service depar.

A thorough thermodynamic study of the theoretical cycle of the Absorption Heat Transformer(AHT) on the basis of the first and second law of thermodynamics provides a very important base and method for improving the AHT s performance.

The writer believes that philosophy and economics contained in Marx’s capital theory can only be revealed by taking the capital theory and value theory as the theoretic core.

Marxian capital theory is an open system as a tight integration in structure,its principles and stipulation are connected closely with each other,and function cooperatively in general processes;their concretization are obtained in the raising of researching conditions and stages.

The capital theory of Neo-Cambridge school derives from Harrod-Domar model and comes into age in the dispute with neo-classicist comprehensive school.