I. Introduction
At present, shrapnel-pill is used extensively, which can cover bigger area, has good damage effectiveness etc, is suitable to attack many kinds of targets. The research of damage effectiveness calculation method is perfect, but damage effectiveness calculation of shrapnel-pill ignoring influence from dispersing blind area. Researches and trials indicate, there is dispersing blind area in shrapnel-pill region central. Assessing influence of dispersing blind area correctly and scientifically is a great question at present. In this paper, math model of stochastic producing method of bullet falling point considering dispersing dead area is set up, damage effectiveness when considering dispersing blind area of shrapnel pill based on two representative targets is analyzed, and through fixing other conditions, analyze different factor's influence on damage effectiveness. Results show dispersing blind area affects damage effectiveness greatly. The conclusion on dispersing blind area is helpful for making attack plan and evaluating damage effectiveness correctly.