The software package for numerical prediction of turbulent flow in conicaldiffusion tube can be used to predict the distributing regularity of all flowing parameters ofincompressible viscous turbulent flow field in conical diffusion tube,scatterer and diffuserin mine, engineering, traffic transportation and aerospace machinery as well as universalmachines,provides a theoretical basis and basic data for optimization and serialization de-sign,furnishes a new tool to testing technology and solves the key technical problems onCAD. This paper makes an emphatical description of the features of this software packageand its application example in the research of computer simulation diagnosis system of tur-bulent flow in conical scatterer.