Gas phase extraction drying method for cefuroxime axetil

The invention relates to a cefuroxime axetil gas phase extraction drying method which comprises the following steps: amorphous cefuroxime axetil hollow spherical powder particles are transferred into a double-cone dryer, the volume of the powder is 30%-60% of the volume of the double-cone dryer, the internal humidity of the double-cone dryer is maintained to be 50%-80%, and rotation is performed for 45-90 min at the speed of 6-10 r/min; then, drying is conducted for 150-240 min under the vacuum pressure of-0.098 MPa or above, and the drying temperature ranges from 40 DEG C to 50 DEG C. Before vacuum drying, materials in the dryer are maintained in a specific humidity range and rotate at a specific rotating speed for a specific time, so that the humidity in the double cones is uniform and stable. Therefore, the surface of the material is softened, acetone in the material and water in the dryer are fully contacted and mutually dissolved to reach a saturated state to be evaporated, then vacuum drying is performe