The invention relates to the technical field of mechanical transmission parts, in particular to a novel split gear which comprises a left half wheel, a right half wheel, lugs, bolts and gear teeth, wherein the lugs are arranged on the left half wheel and the right half wheel and fixedly connected through the bolts, and a ceramic layer is coated on the surfaces of the gear teeth. The novel split gear is simple, compact and reasonable in structure, convenient and fast to assemble and reliable in connection. Connection among gear bodies is tight, and fit clearance is small. When the gear is worn for replacement, the gear can be directly disassembled for replacement, repair difficulties caused by gear wear are avoided, cost is reduced, maintenance time is saved, and the novel split gear is convenient to maintain and easy to popularize and apply.