Abstract: OBJECTIVE To study the compatible stability of cefoselis sulsate for injection in dextran 40 glucose injection. METHODS Investigated the transmutation of the compatible fluid in appearance, pH value in 6 h at 4, 25, 37 ℃, then determined the content of cefoselis sulsate in dextran 40 glucose injection by HPLC. RESULTS There were no obvious changes in appearance, pH value, and also no significant changes in the content of the compatible fluid in 6 h at 4, 25, 37 ℃. CONCLUSION The cefoselis sulsate for injection is stable in 6 hours after mixing with dextran 40 glucose injection.