As a new branch of economics, chaos economics was born at the first of 1980s. It has been rapidly developed since then. R.H. Day, Stutzer, Benhabib, Shafer, Woof, Woodford, Deneekerre, Poliman and others have done a lot of research work in the field of chaos economics. Even so, there are still many open questions about basic theory of chaotic economics. For example, how to find the border point of chaos in the economic data? How to describe the complex degree of chaotic economic systems? And etc. In this paper，we apply the theory of Chaos Economi cs to Shenzhen and Shanghai slcxzk markers．Firstly，the situation of researching the stek market is reviewed．Secondly，the concept of cha os degree and its computational method are set up．Thirdly，as the application oft the chaos degree methods．the chaos degrees of both the Shenzhen and Shanghai stek markets during 1992 to 1997 an calculated and compared．Finally，the methods to control the chaos degre down are put forward