In order to improve the effectiveness of laser warning receiver in laser countermeasure,the layout and evaluation of laser warning receiver are researched. Firstly,the layout elements of laser warning receiver are divided into warning region,warning space,fiducial orientation,layout quantity and horizontal stance based on principle,capability and tactical application of laser warning receiver. The layout requirement for every sub-element is analyzed,and the corresponding evaluation models for layout effectiveness are further established. Afterwards,the index weights of every sub-element are confirmed by using analytic hierarchy process. Furthermore the holistic evaluation model for layout of laser warning receiver is obtained. Lastly,the applied example for the layout and its evaluation of laser warning receiver is also provided. The presented effectiveness evaluation method can be used for automatic evaluation of laser warning receiver layout,and has been used for simulation drilling system of laser countermeasure.