The invention discloses a gradual deepening type hole bottom compensation spiral forceful slotting method, which comprises the following steps of forming a central secondary slotting hole in a workface; forming 5 to 7 primary slotting holes around the central secondary slotting hole, wherein the hole depths of the primary slotting holes are gradually and spirally increased according to distances between the primary slotting holes and the central secondary slotting hole; loading an explosive in an amount of 50 to 70 percent of the hole depth of each primary slotting hole into the corresponding primary slotting hole, and loading the explosive in an amount of about 20 to 30 percent of the hole depth of the central secondary slotting hole into the central secondary slotting hole; during ignition, sequentially igniting the primary slotting holes from inside to outside along a spiral line before the ignition of the central secondary slotting hole. According to the gradual deepening type hole bottom compensation spiral forceful slotting method, the advantages of a barrel type slotting method and a spiral slotting method are combined; the method has the characteristics of fewer slotting holes, low unit consumption, convenience for drilling, short operating time, high explosion efficiency, low cost and the like.