The invention discloses an analysis method for the defect of strip steel. The defect of the strip steel is recognized by a table detector, specifically, whether the strip steel meets the first preset defect feature or not is judged; if yes, the strip steel meeting the first preset defect feature is recognized as the strip steel with a first pressing defect; whether the strip steel meets the second preset defect feature or not is judged; if yes, the strip steel meeting the second preset defect feature is recognized as the strip steel with a black spot defect; whether the black spot defect meets the third preset defect feature or not is judged; if yes, the strip steel with the black spot defect meeting the third preset defect feature is recognized as the strip steel with a second pressing defect; and then based on the periodic defect, a furnace roller generating the periodic defect is determined. By checking and analyzing the problems of the strip steel and the furnace roller, the number of waste products caused by periodic pressing can be reduced, the processing time is shortened, and accordingly the production cost is reduced greatly.