A flying wing rotation mechanism of a micro air vehicle is driven under a control of a power module and a detent member. The flying wing rotation mechanism of a micro air vehicle includes a flapping arm and a flying wing. The flapping arm is connected to the detent member, and swings as the power module drives the detent member. An end of the flying wing is pivoted to the flapping arm. When the flapping arm swings, the flying wing swings with the flapping arm in sync. When swing direction of the flapping arm changes, the flying wing rotates relative to an axial direction of the flapping arm.