The article focused on analyzing the explosion pressure at the different position of initiation point when the charge blasted on the exterior of target under contact demolition.

This paper elaborated one basic approach to give an improved Chinese lesson in elementary schools,namely,to stimulate the children to explore and to think independently through establishment of the initiation point.

The test set of the Explosively Formed Projectile (EFP) with star shaped tail was designed with a multi-point initiation.

In our investigation,the method of three-point initiation was adopted to initiate the shaped charge.

The resulting experimental dates of the design with four detonating points showed that fins can be formed and they can play the stable EFP flight attitude role.

In order to improve the situation that the stor- age mine now could not ascertain the optimum burst point.