To study the corner performance of detonation waves for HMX-based and TATB-based polymer bonded explosive(PBX), the breakout angles, failure angles and delay time for PBX-Ⅰ containing 95%HMX, PBX-Ⅱ containing 85%HMX and 7%TATB, and PBX-Ⅲ containing 95%TATB with initiating diameter of 7 mm and 10 mm were studied by Mushroom test. Results show that with initiating diameter of 7 mm, the breakout angle of PBX-Ⅰ(75.5°) is slightly greater than that of PBX-Ⅱ(74.4°), and the failure angles of PBX-Ⅰ and PBX-Ⅱ are 90°, and they are able to develop for similar spherical. It reveals that HMX-based PBX explosive has better corner performance. With initiating diameter of 10 mm, the breakout angles and failure angles are 78.6° and 90° for PBX-Ⅱ and 16.1° and 60.4° for PBX-Ⅲ, respectively. The breakout angles for HMX-based PBX increase with increasing the initiating diameter, and decreases when TATB is added in HMX-based explosive. The breakout angle decreases significantly as substituting all of HMX with TATB. The corner performance of detonation waves for the three kinds of explosive decreases in the order: PBX-Ⅰ>PBX-Ⅱ>PBX-Ⅲ.