The invention relates to the field of material crushing equipment and particularly relates to a novel ball mill and a using method thereof. The novel ball mill comprises a first barrel body and a second barrel body, wherein the right end of the first barrel body is arranged in the second barrel body; a first feeding hole is formed in an end cover on the left side of the first barrel body; a second feeding hole is formed in an end cover on the right side of the second barrel body; two first wearing rings and two second wearing rings are respectively arranged on each of the outer edges of the first barrel body and the second barrel body; a first roller and a second roller are arranged on a first rotating shaft and a second rotating shaft respectively; a discharging hole is formed in the barrel wall of the first barrel body and the barrel wall of the second barrel body; a sealing device is arranged at each of the discharging holes. According to the novel ball mill, secondary screening of materials is avoided; steel balls and the materials are prevented from being discharged synchronously; the processing flow is simplified; the first barrel body and the second barrel body can individually operate and can be used for processing the materials alternatively or synchronously and processing the materials with different requirements; secondary transportation of the processed materials is avoided when in mixing, so that the cost is reduced.