In order to further study the detonation growth characteristics of main explosive shocked by booster in detonation sequence， the high speed scanning camera was used to capture the propagation trajectory of the detonation wave in the main explosive along the lateral axis， and the detonation propagation process was analyzed by means of numerical simulation. The results show that compared with the HMX-based ideal explosive， the charge of booster plays a greater impact on the development of the detonation wave in TATB-based non-ideal explosive. The detonation wave growth distance becomes longer and the stable detonation occurs at the distance 40mm， when the booster size reduces to Φ10 mm×5 mm. Different from 1D shock ignition test， the initiation process in main charge shocked by the smaller diameter booster has the two-dimensional effects. Thus， the difference of detonation chemical reaction rate along axis and radial direction plays an important roles on the detonation transfer reliability.