Objective: To study the compatible stability of Shuanghuanglian powder injection and 9 common injection. Method : The samples of complexes with the sodium chloride solution as a solvent were collected at room temperature to study the changes of appearanc, pH and to determine content by using HPLC method. Result : White precipitate produced and then content decreased after mixing Shuanghuanglian powder injection with cefuroxime sodium injection. deepened color, pH slightly increased and content decreased after mixing Shuanghuanglian powder with sodium bicarbonate injection and hydrochloric acid injection. Conclusion: Shuanghuanglian powder could not combine with cefuroxime sodium powder for injection or sodium bicarbonate injection, but can combine with other drugs.