Abstract: GPSS-F/1000,a general purpose simulation software package on minicomputer system is described in this paper.This reconstructed package not only has all functions of the initial GPSS-F software package,but also can change all values of systemparameters and array subscripts by formal parameters without the modification ofsource programs of subroutines.Also,statistics parameter evaluation and graphicdrawing subroutines have been designed and add in to this software package.