The invention relates to a wedging type full-layer fertilizer distributor for granular fertilizer. The fertilizer distributor comprises a board-shaped front vehicle frame and a rear vehicle frame which is connected with the front vehicle frame, the front vehicle frame is provided with an engine and a depth controller which is used to control fertilization depth, and the front end of the front vehicle frame is provided with a shaft pipe and a manipulation device; the rear vehicle frame is provided with vertical railways and height control shafts which are located at the railways, and the depth controller is electrically connected with the height control shafts; and each height control shaft is provided with a plurality of hopper-shaped wedging type fertilization machines, the bottom of each wedging type fertilization machine is provided with a fertilizing opening, a fertilizer storage box is arranged above the wedging type fertilization machines, the bottom board of the fertilizer storage box is provided with round holes, wherein the round holes just face to the wedging type fertilization machines in one-to-one correspondence, the bottom board of the fertilizer storage box is provided with baffles which can be opened and closed and are used to cover the round holes in one-to-one correspondence, a position, which is located above the bottom board, in the fertilizer storage box is provided with a vibration board, the vibration board is provided with fertilizer outlets which just face to the round holes in one-to-one correspondence, and the vibration board is provided with blocking sheets which can be opened and closed and are used to cover the fertilizer outlets in one-to-one correspondence.