The invention discloses a dual-clutch transmission adopting a specific reverse gear structure. Particularly, the dual-clutch transmission comprises seven advancing gears, a reverse gear and four synchronizers, and driving gears of the gears in the transmission are all independent gears. The dual-clutch transmission has the advantages that by the design of the specific reverse gear structure, an idler shaft and an accessory gear in a conventional transmission are omitted, the internal structure of the transmission is simplified, manufacturing cost is reduced, and space of the transmission is saved; by the design of the transmission structure with the seven advancing gears, an engine has better economic efficiency and dynamic property; the seven advancing gears and the reverse gear are more reasonable in arrangement and convenient to assemble; each synchronizer is available for two gears, so that the synchronizers are sufficiently utilized; all driving gears are independent gears, gear teeth are more convenient to design and convenient for matching with speed ratio.