Abstract: The object of civil action is the key theory of civil procedure law. The theories of the object of civil action include how to define it and to identify one from others etc. Unfortunately, scholars haven't studied this problem deeply yet by now in China. Most of them hold the view of new theory concerning objective civil action. Constructing the theory of the object of civil action, the right way is considering the relationship between procedure law and the civil law. One should pays attention to the integrity of the theoretical system of procedure action also.