This is a single arm, open-label, Phase 1 study initiated with 3 cohorts:~Cohort 1: 2×10∧6/kg CAR-NK cells, 2 infusions on Day 0 and Day 7 Cohort 2: 6×10∧6/kg CAR-NK cells, 2 infusions on Day 0 and Day 7 Cohort 3: 18×10∧6/kg CAR-NK cells, 2 infusions on Day 0 and Day 7
This trial will explore the maximum tolerated dose of cord blood NKG2D CAR-NK in the treatment of recurrent refractory acute myeloid leukemia in a dose-escalation manner, and observe its clinical safety and efficacy.