Abstract: The equipment commonly used in MPD allows alternative responses to kick that do not require that circulation ceases and the well shuts in.The pivotal issue of kick control for MPD is the early gas influx detection and the initial response of kick.The pressure variation characteristics of bottom hole and well head are analyzed, and then the pressure signature of gas influx is obtained based on the theoretical analyzed, and finally the early gas influx detection model of MPD is established.The influence factors for initial response selection of kick control is analyzed, and then the comprehensive optimization of initial response for kick control is established, in which several factors are took into account, such as formation characteristics, drilling conditions and so on, through which the best initial response for kick control can be obtained easily.The method is evaluated and verified based on one set of gas kick data from the oilfield, which include both gas kick detection and the kick control.The results show that we can make precisely gas detection based on the new early gas influx detection method and the kick can also be control very well based on the optimization method.The method proposed will lay a foundation for the application and popularization of kick control of MPD in engineering.