Structure-variable safety boat

The invention discloses a structure-variable safety boat which comprises a river boat body, a sea boat bottom and an auxiliary cabin part. The river boat body comprises a bow structure and a cabin structure; the bow structure is arranged into a round tip structure and is arranged at the head of the cabin structure, and the bow structure and the cabin structure are integrally formed; the cabin structure comprises a cabin tank, a deck and a concave bottom, the deck is arranged at the upper end of the cabin tank and is airtightly and fixedly connected with the cabin tank, and the concave bottom is arranged at the bottom of the cabin tank. The structure-variable safety boat effectively solves the problem that a river boat cannot go to the sea and a sea boat cannot go ashore; by changing the weight of the boat body, controlling the center of gravity and setting the contact area between the boat body and the water surface, real-time control over the stability of the boat body is realized inmultiple dimensions, and