To explore the factors influencing life satisfaction of 147 family caregivers of longevity elderly through a questionnaire survey. The results showed that 65.3% of the family caregivers of the longevity elderly were satisfied with their current life, and the factors affecting their life satisfaction were the gender of the longevity elderly (OR=3.271), the self-rated economic status of the family caregiver (OR=29.448), and the objective economic income of the family caregiver (OR=0.292). The state and government should improve education on non-gender differentiation in elderly care, so that all children can take responsibility for elderly care, avoiding inconvenience in caregiving and alleviating conflicts between mothers-in-law and daughters-in-law; they should comprehensively assess the economic status of longevity families, reasonably allocate human resources and supplies, provide respite services and "precise assistance", and improve the life satisfaction of family caregivers of longevity elderly.