The invention discloses a split type axle case automobile drive axle. The split type axle case automobile drive axle comprises a drive axle case, an output axle shaft, a left bearing and a right bearing; the output axle shaft is movably arranged on the drive axle case, the left bearing and the right bearing are both arranged on the output axle shaft in a sleeving manner and are both connected to the drive axle case, the output axle shaft is further sleeved with a floating sleeve, and the two ends of the floating sleeve abut against the left bearing and the right bearing correspondingly; and the floating sleeve comprises a shaft sleeve body, a first spring, a second spring and an elastic sheet, the first spring and the second spring are arranged on the periphery of the shaft sleeve body in a sleeving manner, the elastic sheet is embedded into the shaft sleeve body, and a front shaft section of the output axle shaft is sleeved with an inner hole of the elastic sheet. As the structure of the floating sleeve is adopted in the split type axle case automobile drive axle, the influences of stress deformation of the output axle shaft on the bearings can be effectively reduced.