The grafting height of Fraxinus mandshurica is related to the greening purpose. The trunk height of shrub is 0.5m or 0.8m, the trunk height of green belt is 1m, 1.2m or 1.5m, and the trunk height of street trees is 2m or 2.5m. The grafting time is generally in April, when the juice of rootstock begins to flow, and the wound is easier to heal after grafting.