Abstract: A Computer-aided design of forest culture is developed in form of a microcomputer-aided, BASIC program to simulate the design of forest culture for five main timber species in the north of Fujian province. The program includes capability for simulation of growth, intermidiate cuttings and yield, for selection of the proper species and density for a planting site, and for determination of the degree of silvicultural measures and evaluation of site quality. A main-program and five subprogram are produced for APPLE-Ⅱ Computer by the authors. After inputing the data such as site factors and degree of silvicultural measures, the computer can conduct calculations through the mathematics models offered by the authors as well and prints a table of forest culture design. It is expected that the computer design is capable of replacing persons to work for silvicultural alternatives.