The invention relates to an engine hood. In order to solve the problem that the existing engine hood lifting mechanism has a complex structure and a short service life, the invention discloses an engine hood lifting mechanism. The engine hood lifting mechanism comprises an engine hood and an installation platform. Torque lifting devices are arranged on the installation platform. Each torque lifting device includes a long torsion bar of which the two ends are rotationally installed on the installation platform. The two ends of each torsion bar are respectively and fixedly equipped with a push rod and a torque adjustment arm, which are perpendicular to the torsion bar. Each push rod is connected with the engine hood. A spiral adjustment device is arranged between the free end of each torque adjustment arm and the installation platform. According to the invention, the spiral adjustment devices pull the torque adjustment arms to rotate about the torsion bars respectively to produce torque on the torsion bars, and the torque acts on the engine hood through the push rods to lift up the engine hood. The torque of the torsion bars is used as power for starting the engine hood. The engine hood lifting mechanism is simple and reliable in structure.