The process of adjusting parameters which is oppeared in the direct interaction model of inelastic neutron scattering is investigated.Since the integral cross section and angular distributions are both proprotional to the square of V₀ which is the potential well depth of interaction potential between nucleons,V₀ influences the calculated resulth most effectively.A process is given in this paper by which V₀ can be determined naturally after other parameters having been adjusted.By using this process the computer work is greatly reduced.