Abstract: The 64 orthogonal arrays, which originated from the literatures in Chinese, will be categorized according to self-checking of quadratic sum and degree of freedom. The 19 orthogonal arrays in 64 will be selected as the inner core of C program. The algorithms in which the variance of each orthogonal array is analyzed will be designed as 19 subprograms. In this process, the self-checking program will be added, with an example of the running and programming for analysis on results of tri-factors-orthogonal trials by L9(34), the correctness of algorithms will be showed with the running results of C in the same time. Used the Turbo C in Windows 2000, the general source program files, by which more than 150 multi-factor combined schemes are analyzed by data structure’s variance according to the design of classical trials, will be formed. It will establish a new method for data mining but not depend on statistical software.