Aiming at the bore burst problem of a certain type of armor-piercing projectile, the fault tree qualitative analysis of the causes of bore burst was carried out, and the kinematics simulation of the safety mechanism of the fuze tail was carried out by using ADAMS software. The curves of the angular displacement of the revolving body and the three clamping plates varying with time at the initial velocity of 1 050 m/s are obtained. It is found that the projectile has both propulsive motion and rotational motion in the barrel, and there is a possibility of reverse motion when the projectile rotates to its position at this initial velocity, which causes the abnormal operation of the detonating and detonating mechanisms and leads to the chamber explosion. The results show that the method can be used for reference to calculate the influence of other parameters on the reliability of other fuze safety mechanism, and also provide a basis for the design and improvement of subsequent fuze mechanism products.