The invention discloses a software defect positioning method based on relative redundant test intensive reduction, which comprises the following steps: carrying out pitching piles to a source program, executing a test case, and collecting the execution information of the test case; carrying out the reduction to the whole test set according to the covering condition of a source code of the test case; and finally, calculating doubting rate of a statement block and sorting the statement block according to the doubting rate to generate a defect position report. Under the premise of using the samedefect position technology, the defect position effect calculated by a representational set, obtained by the invention, is better than the defect position effect calculated by the representational set, obtained the traditional test set reduction, and the phase differences of scales of representational sets are not more.