And the characteristics of COFF files, command files and head files were analyzed. The function of system software was also analyzed. A digital control program for inverter welding machine was realized by using modularized software design method.

• 分析了COFF文件、命令文件、头文件的特点和系统软件的功能；采用模块化软件设计方法；实现了逆变焊机的数字化控制程序.