With the development of laser weapons, laser warning system is getting more and more important. And sensors are the pivotal part in this system. In this paper some classes are presented according to the form of sensors of laser warning,then the structure of these classes are introduced.Advanced sensors technologies of laser warning are described,which include the compound sensors technology, off-axis sensors technology of CCD, optical fiber sensors technology of intervenes,integrate sensors technology,multisensor technology.Finally,the trend of sensors development is introduced.