Automatic identification method for variable circulation/recursion definition

The invention discloses an automatic identification method for variable circulation/recursion definition, which is used for solving the problem that model recursion calculation cannot be continuously carried out due to the fact that follow-up reordering cannot be effectively processed because variable circulation definition and recursion definition possibly exist in an output model in a modeling process. The algorithm disclosed by the invention is based on a script file output by mechanical modeling, model variables with cyclic definition or recursive definition are accurately identified in an automatic identification batch processing mode through a computer software and hardware platform, and the core algorithm is that a set theory and a symbolic calculation principle are combined; by identifying the set logic relation between the dependent variable and the independent variable, the model variable with the cyclic/recursive definition can be accurately positioned, an original modeling document is returned for