The utility model provides a simple and easy concrete axial tension test piece preparation mould which characterized in that, it comprises shell, baffle and reinforcing bar, the shell be the rectangular sleeve of upper portion open -ended, about by baffle around, baffle and bottom plate constitute, establish the ascending U -shaped groove of opening on controlling the baffle, the central authorities of baffle about the U -shaped groove lower part semicircle centre of a circle is located, respectively there are two vertical recesses front and back baffle inboard, the baffle be the square, its central authorities establish the screw hole, baffle thickness is slightly littleer than vertical recess, the reinforcing bar be the screw -thread steel, the position is slightly thick among them, is equipped with the screw thread corresponding with the screw hole on it, the diameter at all the other positions of reinforcing bar equals with the width in U -shaped groove. The utility model discloses simple manufacture, cost are lower, avoided the reinforcing bar take place in concreting process divergent probably, axle center tensile test result is comparatively accurate.