The utility model discloses a novel test device of concrete shrinkage, the on -line screen storage device comprises a base, base length direction's both ends are provided with first supporting seat and second supporting seat respectively, be provided with between first supporting seat and the second supporting seat at least two with the lower surface contact's of concrete piece live -rollers, thelength direction evenly distributed of base is followed to the live -rollers, the side of base is provided with rotates the support of being connected with the live -rollers, be provided with the fixed knot structure with the concrete butt on the first supporting seat, be provided with the digital display dial gauge with concrete ejector pin butt on the second supporting seat. Compare with staticfriction or sliding friction in the background art, rolling friction's frictional force is littleer, improves and detects the precision, live -rollers bottom not with the last surface contact of base,the person of facilitating the use on to live -rollers and base the piece of concrete clear up, avoid the adhesion of concrete piece on the live -rollers surface, influence the detection precision.