This instrument uses the three-point bending loading method to measure the elastic modulus of non-metallic materials such as ceramics, and is composed of an electric loading system, a deformation measurement system, a pressure measurement system and a computer measurement and control system. The deformation measurement system uses a high-precision displacement sensor to measure the micro-strain. The pressure measurement system uses high-precision pressure sensors and digital pressure gauges for measurement. The three major measurement and control systems are controlled by computers to achieve fully automatic testing, data processing, and printout test reports.