A method for protecting incoming calls in coloring ring back tone service, wherein comprising: the service switching point device sends a message for triggering intelligent networks service to the service control point device; the service control point device instructs the service switching point device to connect the call to the intelligent peripheral; the service control point device reports the connect result and reason to the service control point device; the service control point device analyzes the connect result as well as its reason, if there is a need to protect the call, the service control point device will instruct the service switching point device to connect the called number directly; again, the service switching point device sends a message for triggering intelligent network service to the service control point device; the service control point device sends down the continue message, and the service switching point device will connect the called number. The present invention improves the coloring ring back tone service logic, thereby preventing the service control point device from releasing the call upon receiving a message of call failure, and improving the call completing rate during utilizing coloring ring back tone service.