OBJECTIVE To study the quality of Fructus Rosae Laevigatae and its preparation including edematous amenorrhea, total a shes, ashes which do not dissolve in acid, water ettracts and ethanol extracts. METHODS We used the first edematous amenorrhea determination method in Appendix ⅨH, ashes determination method in Appendix ⅨK and extract determination method in Appendix ⅩA, in the Chinese Pharmacopeoia published in 2000. RESULTS Moisture could not exceed 10. 00% in Fructus Rosae Laevigatae and its meat, ashes could not exceed 4. 10% and 6.00%, ...