The invention discloses pantoea alhagi. A classified name is pantoea alhagi and a strain number is XK-11; the pantoea alhagi is preserved in China General Microbiological Culture Collection Center (CGMCC) and has a preservation number of CGMCC NO. 15525; the invention further discloses application of the pantoea alhagi to enhancement of drought resistance of crops. The invention discloses a bacterium agent taking the pantoea alhagi as an active microorganism, and further discloses application of the bacterium agent to the enhancement of the drought resistance of the crops. The pantoea alhagi XK-11 can be adhered to a plant root system and also can enter plants to be symbiotic with the plants; the absorption of the plants on external nutrient elements is improved, a metabolic system of theplants is improved and a water potential in the plants is kept, so that the growth and development of the plants are promoted and the yield is improved; meanwhile, the drought resistance capability ofthe plants is enhanced. The pantoea alhagi has extremely important meaning and application value in the aspects of sufficiently expressing the ecological fertility of soil, keeping an agricultural ecological environment balanced and the like.