A novel high temperature ring-on-ring Kolsky bar technique was established in this study to investigate the dynamic equibiaxial flexural strength of borosilicate glass at elevated temperatures. The application of this technique has realized non-contact heating of the glass specimen and prevented the introduction of thermalshock upon specimen engagement. Experimental results have demonstrated a profound temperature dependence on the flexural strength. Vickers indentation has been introduced on glass surface to create controllable surface cracks. These surface cracks were then heat treated with the same thermal history as those tested in a high temperature dynamic experiment. The evolution of crack morphology at 200°C, 550°C and 650°C were examined and discussed based on the different regions on the strength-temperature chart. It was found that residual stress relaxation may have played an important role in the strengthening below 200°C, while crack healing and blunting may account for the strengthening above 500°C.