Abstract: In 1983-1985 the ecology of breeding of azure-Winged magpie was studied in Xiao Xinganling mountain．Azure-winged magpie in group with 20-30 migrated to the edge of forest and mated in 1ate Mareh．Nested on branches of a conifer tree in late ApriI．The distance between two nests was 7.5-143m(n=26)．A nest was done usually in 5—7 days．All nests were over the ground at less than 1.5m exempt two．Eggs were laid in early to mid May with 6—10 eggs per brood．Sixteen to seventeen days were needed to brood．The nestlings left their nest in 15—16 days after hatching．But the period of parents care．Sueh as feeding was not stoped until the nestling was as big as their parents． At breeding season，male parent protected the home range against natural enemy and sometimes even rushed at the petson who had been close to its nest．The other task of the male was to feed the nestling and his spouse when she was hatching her eggs and warming her nestling．