The utility model discloses a built -in base bearing of axle sleeve, including sheath (3), axle sleeve (5), axle sleeve fixing base (6) and support piece (8), sheath (3) suit and detachably fix on (mixing) shaft (1), support piece (8) detachably installs on at the bottom of the cauldron (11) the location, the location is connected through axle sleeve fixing base (6) with support piece (8) detachably in axle sleeve (5), its characterized in that sheath (3) suit tip and lengthening under (mixing) shaft (1) outside the tip under (mixing) shaft (1), make its inner cylinder face and the outer faceof cylinder cooperation of axle sleeve (5) form slide bearing's sliding fit face, this design save material, and be applicable to limited jar of body in the internally mounted space, change easy maintenance.