The utility model provides a be used for testing tensile adhesion strength test piece between cast -in -place composite structural layer stretches unit and the tensile unit in the right side includingthe zola, the zola stretches the unit and constitutes " 8 a " font jointly wholly with the tensile unit in the right side to about the holistic minor axis of " 8 " font symmetry, wherein the zola stretches the unit and makes for base material pours, stretchs the unit and pour for the veneer mortar and make in the right side, the thickness that the zola stretches unit and the tensile unit in the right side is 35~40mm, and the concatenation face of the two is vertical rectangle face, wherein, the length of concatenation face is 40~55mm, and the width is 35~40mm. The utility model provides a traditional ground mortar tensile adhesion strength testing method measuring accuracy not high, a fairly large number of technical problem of every group test test piece.