Objective To research the population structure and biological diversity of plague host animal in plague foci in Hebei Province,and provide evidence for the plague prevention and control. Methods Organizing the monitor data of plague host animals in plague foci in Hebei Province from 1990 to 2013,and making some statistical analysis. Results Totally,10 241 rats were caught in the investigation of host animals. Meriones unguiculatus was the dominant species accounting for 65. 3%,followed by Spermophilus dauri...