A rice-wheat harvester header lifting device belongs to the technical field of the rice-wheat combine harvester. The prior small rice harvester adopts the manual-driving way to lift the header, which makes the operator tired, makes the lifting of the header inconvenient and slow. The utility model is characterized in that the rice-wheat harvester header lifting device also comprises a rectifier, a battery, a switch, a direct-current motor and a worm gear mechanism; the switch is arranged on the operation platform, the rectifier, the battery, the direct-current motor and the worm gear mechanism are arranged on the body of the rice-wheat harvester, the direct-current motor, the worm gear mechanism and a rotary roller are assembled together in order through the way of the power conveying, the rectifier is connected with an alternative-current motor through a leading wire, the rectifier is connected with the battery through a leading wire, two stroke switch are arranged on the up-down stroking bracket of the rice-wheat harvester, two relays are arranged on the body of the harvester. The utility model adopts the electric-power controlling way on the rice-wheat harvester to lift the header, thereby enabling people to operate conveniently, saving time and labor; moreover, the header lifts rapidly and the utility model saves the energy source.