The significance of measurements for high temperature strength of investment casting shell materials was expounded. The structure

measuring principle and operation of a new measuring tester for bending strength at a high temperature are introduced. The measuring tester can obtain high accuracy-position and reduce synchronous-temperature testing time between mould and sample by holding sample in a high temperature model

approximately exhibiting stress state of poured shell mold. Based on above principle

computer can visualize the loading curves and experimental temperature through treating measuring symbol from loading device-measuring-force-sensor-A/D converter. The results show that the measuring error of the measuring tester is below 0.1%

showing high accuracy. Meanwhile

measuring results indicated as loading curves and temperature is accurately visualized

which is helpful to finding out abnormal data and to treating experimental data

meeting the requirements of research institution and enterprises.