Abstract: Anchor load cells are widely used to find out stress of anchor loads and evaluate the stability of slopes. In some situation, the wire of anchor load cell does not vibrate after being damaged, so it is necessary to correct the data with proper method. In this paper, the author analyzed the mechanism of anchor load cells, suggested two methods for data modification and compared the result with back- analysis method. Where the errors originated from was analyzed, too. The result indicated that the frequency percentage method was a concise and accurate method which could meet the engineering requirement.