The utility model relates to a novel carbon brush gear for a turbo-generator, which is structurally characterized in that a positive pole and a negative pole are fixed between a fixing support and a bottom support through an insulating board and an insulating bottom board and symmetrically distributed on two sides of an air guide cover, air guide rings are mounted on two sides of the air guide cover, a conducting copper busbar is fixed on a positive pole fixing seat or a negative pole fixing seat, two to six single carbon brushes are assembled together to form a composite brush handle, a positive pole collector ring plate or a negative pole collector ring plate is formed by four semicircular copper ring plates, every two semicircular copper ring plates are connected between a connection copper busbar and the fixing seat to form an integral ring, and a plurality of composite brush handles are mounted between two integral-circular collector ring plates in circumferential distribution. The novel carbon brush gear greatly reduces casting working load, reduces assembly volume and weight of the whole carbon brush, saves cost for enterprises, has reasonable ventilation cooling, namely the cooling collector ring plates and the carbon brushes, can effectively collect carbon powder, favors ventilation cooling via carbon brush integration prior to group assembly, effectively prohibits partial heating, and greatly increases operation reliability.