The work aims to sort out the current disaster warning graphics in China, explore the attributes of disaster warning graphics from the perspective of design and deduce the key points of visual information communication efficiency of disaster warning graphics. Through questionnaire survey, the quantitative data were obtained and a conclusion was drawn. Combined with case analysis, the communication efficiency of disaster warning graphics was deduced. Based on semiotic theories, the methods to information design and communication efficiency of disaster warning graphics were studied. It was concluded that "demonstration function" and "dynamic efficiency realization" could realize the effective communication of popular science to disaster warning graphics. The communication efficiency of visual information in disaster warning graphics needs to be based on the integrity and accuracy of information.