The invention discloses a cutter bar assembly of a multi-edge angle-milling machine. The cutter bar assembly of the multi-edge angle-milling machine comprises a cutter bar base, a cutter bar shaft, a front bearing cap of a cutter bar, a rear bearing cap of the cutter bar, large bearings, small bearings, a large round nut, a small round nut, a large inner retaining ring, a large outer retaining ring, a small inner retaining ring, a small outer retaining ring, a cutter head, locating keys, a locking block and a driving wheel, wherein four threaded holes are formed in the bottom of the cutter bar base and used for mounting fixing screws, the front end and the rear end of the cutter bar base are connected with the front bearing cap of the cutter bar and the rear bearing cap of the cutter bar, the cutter bar shaft is arranged at the center of the upper part of the cutter bar base, the front end of the cutter bar shaft is connected with the cutter head, the cutter head is fixed at the front end of the cutter bar shaft by two locating keys and one locking block, the rear part of the cutter bar shaft is closely fitted with the rear bearing cap of the cutter bar and used for mounting the driving wheel, a pair of large bearings, the large round nut, a pair of small bearings and the small round nut are arranged between the cutter bar shaft and the inner surface of the cutter bar base, the large inner retaining ring and the large outer retaining ring are embedded in two large bearings, and the small inner retaining ring and the small outer retaining ring are embedded in the two small bearings.