It is difficult to analyze the pressure-bearing characteristics of wooden building materials, because of their strong nonlinear behavior under strong earthquakes. In this study, a method of analyzing the pressure-bearing characteristics of blockboard under strong earthquakes is proposed. A building material model is designed, and the pressure-bearing characteristics are determined, and then feature extraction is carried out accordingly. Subsequently, comparative tests are carried out under a simulated strong earthquake. Combining the extracted pressure-bearing characteristics of the blockboard building material, the precision, applicable range, and phase of PS point are analyzed. The results show that the pressure-bearing analysis method of the blockboard building material under strong earthquakes can determine fracture location and pressure level of location in the shortest time and accurately evaluate the performance of the blockboard building materials.