The invention provides an ultrasonic vibration elastic loading device for wire saw cutting. An elastic ultrasonic vibration table is mounted on a cutting machine working table (a feeding dragging plate), and notches with opposite openings are formed in a connecting part of the elastic ultrasonic vibration table and the working table, so that the yield force of the vibration table is weakened; therefore, the vibration transmission efficiency of a transverse vibration or longitudinal vibration transducer is improved, minimization of the transducer is facilitated, and the power consumption is reduced; meanwhile, the dual-ultrasonic transducer is used for loading longitudinal vibration or transverse vibration to the elastic ultrasonic vibration table, so that the elastic ultrasonic vibration table does forced ultrasonic vibration to drive a workpiece and a consolidated electroplated diamond sand line to do relative vibration, and thus the aim of efficient and high-precision ultrasonic processing is fulfilled.