Objective To describe the current status of the caregiver preparedness in mothers of fetus with treatable congenital malformation,and to explore its influencing factor.Methods 210 pregnant women with fetuses diagnosed with treatable congenital malformations in the obstetrics department of a tertiary specialized hospital in Dalian were selected as the study subjects by convenient sampling method from November 2022 to August 2023.The survey was conducted using the General Situation Questionnaire,Caregiver Preparedness Scale,Simplified Coping Style Questionnaire,shortened Chinese version of the Family Resilience Assessment Scale and Social Support Rating Scale.The factors influencing the caregiver preparedness in mothers of fetus with treatable congenital malformation were analyzed using univariate analysis and multiple linear regression.Results Finally,201 mothers of fetuses with treatable congenital malformations were included in the study.The total score of caregiver preparedness was(20.47±6.29),among which the emergency response,management dimension and care stress dimension scored lower.It is concluded that education level,age,subjective support,use of social and economic resources and negative coping are the factors that affect the caregiver preparedness in mothers of fetus with treatable congenital malformation.Conclusion The caregiver preparedness in mothers of fetus with treatable congenital malformation needs to be improved.Medical staff should design a personalized and comprehensive nursing plan to intervene according to the factors,so as to improve the recovery and quality of life of children.