This paper puts forward a fast efficient algorithm of simulating 3D colorful trees on the basis of deeply studying various kinds of models. The algorithm not only simplifes the topology structure and upgrowth law, but also introduces nice-specialties and simple-calculation and well-controlled stochastic parameters. So generated trees have some good traits, such as varieties and lifelike-graph and fast-speed, The algorithm has achieved standard real-time simulation effect on ordinary PC.