Heavy-load carton with lock catch

The utility model relates to the technical field of cartons, in particular to a heavy-load carton with lock catches, which comprises a carton cover and a carton body, lock catch structures are arranged on the left side and the right side of the carton cover, each lock catch structure comprises an insertion block, the top ends of a plurality of insertion blocks are fixedly connected with the carton cover, ratchets are processed on the two sides of each insertion block, and each insertion block is fixedly connected with the carton body. The inserting block is connected with the limiting block in a clamped mode through the ratchets. When a user inserts an insertion block into a sleeve block, ratchets on the outer side of the insertion block are connected with a limiting block in a clamped mode, so that the insertion block cannot move in the opposite direction due to the limiting block, the user pulls a round block, the round block drives the limiting block to move outwards so that clamping connection between the