Positioning device for large sand box

The utility model relates to the technical field of casting, and discloses a positioning device of a large sand box, which comprises an outer box ring, an inner box ring is fixedly sleeved inside the outer box ring, positioning pin bushes are fixedly connected to two sides inside the inner box ring, positioning mechanisms are movably sleeved inside the positioning pin bushes, and the inner box ring and the inner box ring are fixedly connected with the positioning pin bushes. A guide plate is arranged at the bottom of the positioning pin sleeve, and the top of the guide plate is fixedly connected to the inner wall of the bottom of the inner-layer box ring. The positioning rod body in one positioning mechanism is connected with the interior of the positioning pin sleeve arranged on the inner side of the top of one box ring in a clamped mode, the guide rod body in the positioning mechanism is connected with the guide plate arranged at the bottom of the other box ring in a clamped mode, and the positioning rod bo