Objective To study the method of emergency blood collection during a long-distance voyage to ensure blood transfusion treatment.Methods Ten voluntary blood donors were recruited, a base unit of blood was collected and preserved.Reactions of the blood donors were observed, and the blood quality was tested.Results The success rate of blood collection was 90% and the qualification rate was 100%.Conclusion Emergency blood collection during a long-distance voyage is feasible,which can help ensure blood supply in peace time or war time.