Abstract: Steady—state simulation methods for gas networks such as multi—dimensional Newtonian nodal method。one—dimensional Newtonian nodal method.multi—dimensional Newtonian loop method, one-dimensional Newtonian loop method and nodes linear approximation method are introduced.An improved technical method is put forward to modify the above mentioned conventional steady—state simulation methods. Analysis and comparison are carried out on calculation results obtained from the improved method and conventional methods.Resuhs show that in terms of calculated amount improved nodes linear approximation method is equal to other methods, but less simple for initial value requirement, original data preparation, etc.and it is characterized by higher computational efficiency, convergence and convergent rate, etc.