Abstract
Frailty is a recession of age-related reserves caused by a variety of causes and is becoming the most important clinical syndrome that affects the health of the elderly. In the elderly, frailty and cognitive dysfunction often exist, and some people have proposed cognitive frailty. Cognitive frailty is an elderly syndrome that increases the risk of dementia, in the same time, and can independently predict the adverse health outcomes of the patient and affect the quality of the patient’s survival. This paper, under the guidance of Walker and Avant method, provides theoretical basis for early recognition and intervention of cognitive weakness in the elderly.