Aimed at the problem that it is difficult to reach up to exact plane for plane-wave generator (PwG). It is studied that the characteristics of Ba(NO3)2 have an effect on the precision of PwG, which makes full use of the mold of Ф100 mm×37° PwG and the basic explosive formulation. The results show the round, smooth and uniform Ba(NO3)2 in shape is beneficial to deposition sedimentation and improving the uniformity. The distribution and graduation of particle influence the content and internal quality in its low velocity layer structure. It can make