Abstract: According to fancy yarn′s producing mechanism,this paper provides a new design of control system for hollow spindle novelty twister.The fancy yarn process parameters and machine adjusting parameters are integrated in the software design and introduced into the database.In this way,based on dual-RAM and PCI bus,all the parameters are transmitted to machine driving system to realize the parallel communications between IPC and MCU.IPC is responsible for sending and receiving data,while MCU is responsible for monitoring machine driving system,which regulates rotors of the twister and execute real-time changing speed.Thus it produces various kinds of fancy yarn and realizes the control of hollow spindle novelty twister.