The Longjing tea roasting machine controlled by computer is consisted of computer, multifunction machine and performing framework. Stored the data of Longjing tea processing in the computer, the computer controlled the heating temperature, processing time, rotational speed, pressure and stopping motor during the period of Longjing tea processing. The computer stored 12 processing programs which serve at the fresh tea leaves grade and various environment. The quality of Longjing tea processed by this machine is better than that of processed by hand. Thus solving out the problem in the production of Longjing tea mainly depand on the manual operation. Besides, the automatic level in the processing of fine-quality tea was improved simultaneously.