The invention discloses an automatic deformation adjusting device for a steel face plate dam. A truss is arranged between a dam body and a steel face plate. A plurality of deformation adjusting device bodies with the thrust function are evenly distributed and connected between all supporting points of the truss and the inner wall of the steel face plate, springs are arranged on the outer sides of the deformation adjusting device bodies in a sleeving manner, pressure sensors are installed at one ends or the two ends of the springs, and the thrust of the deformation adjusting device bodies is controlled to be increased or decreased by judging the pressure of the springs. By means of the automatic deformation adjusting device for the steel face plate dam, the local deformation problem of the steel plate dam can be quickly solved, the local stress situation can be found as early as possible and adjusted in time through information feedback of the pressure springs and the pressure sensors, the deformation problem is solved at the micro-deformation stage, and thus larger deformation can be prevented from occurring. The adjusting manner is quick and effective. The structure of the dam body is maintained unchanged integrally, and the service life of the dam body is prolonged.