The invention discloses a method for querying texts based on a mutual index structure. The method comprises the following steps of: segmenting text files needing to be indexed to acquire a text block array containing words with a fixed number; constructing an inverted index structure; calculating the characteristic value of every text block and saving the characteristic value in a feature index file; defining a pointer address length at the end of each text block by virtue of a variable-length algorithm and acquiring a pointer value which is the feature value address corresponding to the text block in the feature index file according to the pointer address length; finding the feature value of the text block according to the feature value index of the specific text block in the text file; and reading the feature value of the text block and comparing the feature value of the text block with the feature value of the queried words to determine whether the queried words are contained in the text block. The method can be used for accelerating phrase match speed, reducing input/output (I/O) operation, decreasing calculation complexity and improving query efficiency and match accuracy.