Based on the onedimensional longitudinal vibration model of highovertone bulk acoustic resonator (HBAR), several frequency correction methods for HBAR operating at a certain resonance frequency, namely, thinning the substrate or top electrode,or depositing thin films on their surface,are studied. And the changes of effective electromechanical coupling coefficient(K2eff) and mechanical quality factor(QM) before and after frequency correction are discussed.The results show that for the HBAR structure of this paper,the frequency correction method of thinning the substrate is the best, and the influence on K2eff and QM is the least.If adopting the frequency correction of depositing thin film, it is better to choose the materials with low attenuation since it has great impact on QM while little impact on K2eff.