The present disclosure discloses simplified text classification with improved classification accuracy. The content of receive text is segmented to obtain multiple words. A sum of word vectors of the multiple words at a first level vector space of a vector space group is determined. A vector space in the vector space group is composed of one or more direct child classes that are non-leaf child classes in a tree class structure. The text is classified into a class among various class of the first level vector space that has a shortest distance to the sum of the word vectors.