The invention relates to a measurement method for consistency strength of an index table and a master file based on inconsistent windows. The method comprises the steps that records in the master file are read from existing database index software; reading or writing operation is performed on the records in different processes to obtain measurement operation; serialization is executed concurrently in multiple processes to obtain execution sequences; the execution sequences are ordered according to ending time of the measurement operation to obtain result sequences; and finally the sizes of the inconsistent windows under an index technology are calculated according to the inconsistent window measurement method. Through the method, defects of existing database index technologies are overcome, wherein the defects are that a method for quantitatively measuring the consistency strength of the index table and the master file is not available, and the consistency strength of the database index technologies belonging to the same consistency model cannot be compared.