The invention relates to the technical field of engine manufacturing and machining, in particular to a milling method for a floating disc end face oil wedge. A rough turning process is carried out on a part for two times, large allowance is removed, an inner hole, an outer circle and end faces are respectively turned, a finish turning process is carried out on the part for two times, the inner hole, the outer circle, the end faces and process steps are respectively turned, grinding and lapping procedures are used, the end faces and the inner hole are machined, the ground inner hole serves as the standard, the outer circle is subjected to finish turning, oil grooves, chip grooves, wear termination lines and 20-degree process U-shaped positioning grooves of the two end faces are milled, the milled oil wedge face is polished to Ra0.4, the outer circle is subjected to the finish turning process, vapor deposition is carried out on the part, and the size of the part is rechecked. Through the above steps, the machining quality stability and machining quality of the floating disc end face oil wedge face are improved.