Abstract: To solve the problem of translating pattern to control data in embedded computerized flat knitting machine,a novel method of compiling pattern data is introduced.Firstly,the system framework of compilation software is established to describe compile procedure of pattern data and process of needle selection data in detail.Then,two pattern description files(PAT and CNT) are designed,which include all information that needle selection needs,such as various colors of sweaters,parameters of density and roller,and so on.These two files are compiled into row-control data and needle-selection data that ARM controller can execute when flat knitting machine is working,thus realizing the control of knitting. Moreover,in order to ensure the continuity of controlling and enhance the stability of knitting,data buffer is used.This method has proved correct and effective in application.