OBJECTIVE To measure the content of tanshinoneⅡA in prepared salvia miltiorrhiza slices on current market and analyze the result.METHODS Measure the content of tanshinoneⅡA according to The Criterion of Traditional Chinese Medicine Processing of Shandong Province,compare the result with the criterion and analyze the reason for the difference.RESULTS In general, the content of tanshinoneⅡA in prepared salvia miltiorrhiza slices is comparatively low,which is resulted from various factors.CONCLUSION This paper measures and analyzes the content of tanshinoneⅡA in prepared salvia miltiorrhiza slices and provides a reference for the improvement of the quality standard of prepared salvia miltiorrhiza slices