Abstract: Fractal graphics techniques are studied through  computer simulation.After the analysis of theories of fractal graphics,two generating methods are proposed:DLA model and Lorenz attractors.It is usually difficult to understand how Lorenz attractors and strange attractors form interesting moving tracks.By studying chaos attractors and visualizing their tracks with the help of software,one can understand its nature more deeply The Parametric Design for Fractal Graphics described by Delphi is a useful tool for fractal graphics analysis,which screens out main parameters that determine its morph by means of computer simulating.

Key words: fractal, chaos, attractor, parameter, simulating