In the first place, the article discusses the theory, content, development, and questions about structured programming
design. The further extension on this basement provides the cycle structure in computer language is the sequence
structure, branch structure, and the cycle structure with independence. Through the deeply research by the writer, we find
the non-independence and reach the final simplification about the computer language design. In the first, the writer
provides the language structure of linear structure (I structure) and curvilinear structure (Y structure). This makes the
computer language has high proficiency with simplification during the program exploration. The research in this article
is corresponding with the widely used dualistic structure in the computer field. Moreover, it is greatly promote the
evolution of computer language.