The work aims to summarize the research progress of ultrasound-assisted heat pump drying technology in agricultural product drying, so as to provide theoretical guidance for the industrial application of ultrasound-assisted heat pump drying technology. The action mechanism of ultrasound-assisted heat pump drying technology, the effect of ultrasound-assisted technology on the microstructure and drying rate of agricultural products during heat pump drying process, the process prediction of ultrasound-assisted heat pump drying for agricultural products and the final quality were discussed. Furthermore, the measures for improvement were put forward. The development of ultrasound-assisted heat pump drying technology had great potential, and the related research was still in the primary stage, in which the interaction between ultrasound enhancement and heat pump drying as well as the establishment of suitable kinetic model to predict the drying process were the new direction of the research to realize the industrialized production. The use of ultrasound-assisted heat pump drying technology can enhance the rate at which agricultural products are dried, decrease energy usage of the equipment and simultaneously minimize nutrient loss and the presence of harmful substances in the dried products. This technology also has the potential to enhance product quality and has broad potential applications in agricultural product drying.