Keyword: Macro-Economy, Kaldor Economic Growth Model, Stability Analysis.

Kaldor economics model is a classical model of Keynesian economics system including the factors of national income, money and capital stock generally, which can exactly forecast the economical fluctuation in simple assumption．We analysis a new built model by taking into production function based on Kaldor basic model．

We consider money as a constant simply and mainly focus on the situation of capital stock．Production Function includes parameters of private capital stock, social capital stock and labor．In practical social market, there are several kinds of social capital, and the two above are the most important one．So we build a new Kaldor dynamics system, which omit the labor parameter and become a non-dimensional system．Next we analyze the local stability when fiscal policy adjustment speed and fiscal policy adjustment strength change continuously separately．

At last we carry out the numerical simulation．The result is when we fix the fiscal policy adjustment strength, the economy is stable if fiscal policy adjustment speed less than a fixed value, and otherwise economy will be unstable．When we fix the fiscal policy adjustment speed, the economy is stable if fiscal policy adjustment strength less than a fixed value, and otherwise economy will be unstable．