Engineering design exists a great deal of similar topology relational graph. It can not achieve these designs only depending on the method of ordinary interactive computer auxiliary design speedily and accurately, however this method of parameterization design can solve this problem through the way of compiling simple computer programming. The authors propose the idea of computer auxiliary design parameterization technique and analyze its essential principle by brief explanation and legend to emerge the new aspect of field of computer auxiliary design of parameterization technique. Meanwhile, together with the simple computer programming, the authors show the specific application of this kind of technique detailed by the example of interior design. By means of wide-ranging application of computer auxiliary design of parameterization technique, numerous engineer and technician's design level must be improved extremely.