The utility model discloses a control device used for pile foundation penetration perpendicularity in a model test. The control device comprises a positioning plate, a cantilever beam, a casing, a guide rod and a joint; the cantilever beam is in a horizontal shape; one end of the cantilever beam is fixedly connected with the side of the positioning plate; the other end of the cantilever beam is fixedly connected with the external surface of the casing; the cross section of the guide rod is a plane where corners and edges are formed; an axial through hole matched with the guide rod is arranged in the casing; the axial through hole of the casing is in a vertical state; the casing is sleeved at the external side of the guide rod; the joint comprises a bottom plate and a connecting pipe; the bottom surface of the connecting pipe is fixedly connected onto the geometric center of the bottom plate; the upper part of the connecting pipe is fixedly connected with the lower part of the guide rod; and at least two through holes which are uniformly distributed at the surrounding of the geometric center are formed in the bottom plate. The control device provided by the utility model can meet the requirement of the pile foundation penetration perpendicularity in the model test, and the pile foundation can be penetrated along the vertical direction in the model test.