Casting mold convenient to machine

The utility model discloses a casting mold convenient to process, which comprises a base, a lower mold fixedly mounted at the top end of the base, four support columns fixedly connected to the top end of the base, a transmission mechanism connected to the top ends of the support columns, an upper mold connected to the transmission mechanism, and two sliding devices arranged on both sides of the upper mold, the sliding device comprises a connecting block, pulleys and a fixing block, one side of the connecting block is fixedly connected with the upper mold, the connecting block is in sliding and penetrating connection with the supporting column, two grooves are formed in the top end of the connecting block, the fixing block is located in inner cavities of the grooves, and the two pulleys are in rotating and penetrating connection with the inner wall of the fixing block through rotating shafts; sliding grooves are formed in the two sides of the supporting column, and the pulleys are slidably connected with inner