Pressure decentralized anchor cable has more rational stress performance and extensive engineering applicability, with which stress concentration in anchorage section and too early steel strand tensile failure caused by unevenly stressing can be avoided. It was applied more and more in fractured rock slope reinforcement in recent years with ideal effect. Based on an engineering case of emergency response to geological disaster in Guangzhou, the paper put forward the design principle and value according to the ultimate resistance of pull-out test on pressure decentralized anchor cable, and detailed the construction technology.