A carton structure comprises a top cover and a bottom cover. The top cover comprises multiple first side walls and multiple first tongues; the first tongues are connected with the first side walls and used for being fixed to the inner surfaces of the first side walls adjacent with the same. The bottom cover comprises multiple second side walls and multiple second tongues; the second tongues are connected with the second side walls and used for being fixed to the inner surfaces of the second side walls adjacent with the same. The bottom cover further comprises reinforcing pieces connected with part of the second side walls and disposed on the outer sides of the second side walls. When the top cover covers the bottom cover, the reinforcing pieces are used for filling gaps, generated by the first tongues, between the top cover and the bottom cover.