Abstract: A new control system of the fully automatic flat knitting machine developed based onμC/OS-Ⅱ embedded technology was introduced,and the functional requirements of the flat knitting machine and execution of its control system were analyzed.This system used a 32-bit ARM microprocessor and an expander as the hardware carriers and theμC/OS-Ⅱas the real time operation system.It adopted the design of multi-tasks,and realized the task scheduler by its priority and communications between tasks with theμC/OS-Ⅱoperation system.