Abstract: To address the limitations that classical continuum mechanics fails to accurately characterize the dynamic behavior of curved beams at the micro-nano scale and existing models cannot fully couple the curvature effect, small-scale effect and shear deformation, this paper presents systematic analytical research and experimental verification, aiming to reveal the forced vibration characteristics of micro-nano Timoshenko curved beams and provide a theoretical basis for the design and performance evaluation of Micro-Electro-Mechanical (MEMS) resonant devices.Based on the nonlocal elasticity theory and the cross-sectional mechanical equilibrium of Timoshenko curved beams, a characteristic scale parameter is introduced to revise the material constitutive relation. With the consideration of shear deformation and rotary inertia of cross-sections, the forced vibration governing equation for micro-nano Timoshenko curved beams is derived and established. By adopting the separation of variables method and Laplace transform, the analytical solution of Green's function applicable to multiple boundary constraints (e.g., simply supported and fixed ends) is constructed. The theoretical consistency is verified through degradation cases. By matching the geometric and material parameters of a monocrystalline silicon MEMS resonator, comparative validation between theoretical solutions and experimental measurements is conducted via transimpedance amplification readout experiments.The results indicate that the error between the proposed analytical solution and existing literature results is within a reasonable range. The relative error between the theoretical and measured natural frequencies is stable at around 0.46%, and the amplitude-frequency response curves are in good agreement. An increase in the small-scale parameter weakens the equivalent structural stiffness, and its influence on natural frequency becomes more pronounced as the slenderness ratio rises. There exists a significant coupling law among boundary constraints, excitation frequency and the small-scale effect. This study can provide theoretical support for the vibration analysis of micro-nano curved beams and the development of core MEMS devices.