Being an essential part and form of city constr uction, city forest has powerful ecological functions and plays an important role in urban afforestation and soil and water conservation.By the investigation of forest in Ganzhou City and the thorough analysis of the constructional conditions and present situation,this article concludes that the forest system of Ganzhou City should defer to the pattern of three levels-the spot,the line, and the surface . The article also proposes the optimization of urban forest layout and the main con-struction ways