The invention relates to the medical field, and more particularly to a blood collection structure and an automatic sticking method for a hematology department. The side of a base comprises a hinge shaft for hinging a lower half ring fixed on the base and a movable upper half ring, and each shell internally comprises an extruding structure which is an inflatable layer capable of telescoping; the extruding structure is externally connected with an inflatable tube and is in a laminated or helical strip shape, and the helix refers to helical arrangement around the inner wall of the shell; a butting part of the upper half ring and the lower half ring comprises two butting pieces, and the two butting pieces can be buckled or locked; the side of the base comprises an arc-shaped groove, and a blood drawing tube can be placed in the groove. Without tightening with a rubber band for different persons, the arm of a person is directly put between the upper half ring and the lower half ring, and is extruded by the extruding structure by inflating, so that the blood can be conveniently drawn, the work load is reduced by quickly drawing blood, and the inflatable structure may be an automated inflatable structure.