The utility model discloses an eggshell strength detector and belongs to the field of mechanical equipment. The eggshell strength detector comprises a force sensor fixed on a counter weight through a force sensor fixing piece, wherein the counter weight is fixedly connected with a nut; the nut is movably sleeved on a lead screw in an upright post and can move up and down along the lead screw; the upright post is fixed on a base; a data line connected to the force sensor penetrates through the counter weight and the upright post and is fixed in a threading groove in a threading positioning block connected with the nut; the up-down movement space of the data line is respectively defined by the nut and the threading positioning block. The data line on the force sensor is hidden in the upright post of the eggshell strength detector, so that the eggshell strength detector is neat and attractive in appearance, convenient in boxing, simple in structure, low in cost and convenient to popularize and use.