In this paper, a method of classification is proposed based on the similar information of data properties. The new method assumes that data properties are basic vectors of m dimensions, and each of the data is viewed as a sum vector of all the property-vectors. It suggests a novel distance algorithm to get the distance of every pair of the property based on similar information of the basic property vectors. An algorithm of data classification is also presented based on correlation computing formula composed of property vectors and projections of each other. Efficiency of the new method is proved by extensive experiments.