A test method of redundant data comprises the following steps of performing redundant data collection and sequence composition; performing a sequence characteristic value test, the Dixon test and a deviation product test; and performing redundant data status information prompt. The invention aims at providing a method which can be achieved on a computer and is suitable for the accuracy discrimination of the redundant data in any situation; and the discrimination reliability of the method is required to be high. The sequence characteristic value test and the deviation product test introduce uncertainty of measurement, so that the arbitrariness or complication of threshold selection by experience is avoided; accordingly the test parameter setting have rules to be followed and test results are reliable.