Casting part size detection device

The utility model discloses a casting part dimension detection device, and relates to the technical field of detection devices. The device comprises a base, two sliding grooves are formed in the upper side of the base, sliding blocks are arranged in the sliding grooves in a sliding fit mode, pulling ropes are fixedly connected to the opposite sides of the two sliding blocks, a rectangular groove is formed in the upper side of the base, and rectangular blocks fixedly connected with the opposite ends of the two pulling ropes are arranged on the inner wall of the rectangular groove in a sliding fit mode; the upper side of the rectangular block is fixedly connected with a placing plate, and a spring is arranged between the sliding block and the sliding groove. According to the utility model, through the arrangement of the rectangular block and the traction rope, when a casting part is placed on the placement plate, the placement plate is stressed to drive the rectangular block to move downwards, and under the pul