Objective To understand family members′ needs of CICU children during transitional period, and to provide a reference for developing targeted parental support interventions. Methods A total of 124 family members of children transferred to the department of cardiac surgery from CICU after surgery were selected by convenience sampling, then they were investigated by using the scale for assessing the needs of families of CICU children during transitional period.And a descriptive qualitative study was conducted, thirteen family members of CICU children during transitional period were selected by purposive sampling to interview their needs of care during CICU transition. Results The mean item score of the scale for the participants was (4.48±0.40), and the mean score of each subscale was more than 4 points, with the score of communication needs was the highest. Four themes were extracted from the interview data:expect to obtain more information about their children before transfer, improving their readiness for transfer, looking forward to more psychological support and guidance on care skills, hope to prolong the time of two family members caring. Conclusion Family members′ needs of CICU children during transitional period are high.It is necessary to provide systematic and informative transitional support for family members taking into account the characteristics of their children,so as to help children and their families pass through the transition period successfully.