How to seal and waterproof a container house? The container house is a new type of mobile house, and its performance in all aspects is much higher than that of other types of mobile houses, and the sealing performance of the house is the same. From the analysis of the sealing performance of the container house, the sealant is mainly used for the sealing of the mobile house. The structural sealability of the container house and the performance of the sealant determine the sealing performance of the container house. The roof structure of the container house adopts double protection, and the steel plate is added to the roof. On the one hand, it can protect the roof of the container house from damage, and on the other hand, it can enhance the waterproof performance of the container house. The steel plate of the roof is processed into a concave-convex spacing pattern, and the steel plate are connected at the convex part, which can minimize the probability of roof leakage. At the same time, adding sealant to the joints of the steel plate on the roof of the container house to further enhance the waterproof performance of the roof.