At present, many of the processing algorithms for the incomplete, diversity, and multiple-value data, but further processing is not introduced after filled. First calculated the probability of the missing attribute value in a certain scale, set the threshold, when the attribute probability is greater than or equal to the threshold value to fill in the missing; Secondly the information system after treatment is represented with hierarchical and visual decision tree; Finally designed and applied the algorithm, then verify the validity and practicability of the algorithm.