Powertrain for a hybrid vehicle

An exemplary embodiment of the present invention provides a drive train for a hybrid vehicle, who has three or when a vehicle is driven at a fixed speed ratio more fixed ratio modes, so that the switching stages of a conventional transmission only by the driving force of a motor without driving a motor can just as an electric vehicle mode, which is the basic drive mode of a hybrid vehicle, and two or more drive division modes which include an input-division mode and composite mode achieve -Generators, wherein while the vehicle is at a high efficiency according to the driving conditions is driven, whereby fuel efficiency can be improved.