Micro aerial vehicles (MAVs) exhibit low-altitude, slow-speed flight characteristics, with characteristic Reynolds numbers significantly lower than those of conventional aircraft. Under the influence of unsteady aerodynamic forces, rotational centrifugal forces, and other loads, rotor structures are prone to deformation, which can degrade aerodynamic performance. This study utilizes a fluid-structure interaction (FSI) analysis method to conduct a numerical simulation of micro rotor blades. A dynamic mesh approach was employed for transient numerical simulations to reveal the dynamic behavior of the flow field and provide system dynamic responses. Structural responses were obtained using finite element methods, enabling bidirectional data transfer between aerodynamic loads and structural responses. This work supports the optimization of micro rotor design.