Bionic underwater robot

The invention discloses a bionic underwater robot. The bionic underwater robot comprises a main body structure; the number of the forelimb structures is at least two, and the movement modes of the forelimb structures comprise contraction movement and stretching movement; the forelimb structure comprises a forelimb upper skeleton and a forelimb lower skeleton, the forelimb upper skeleton and the forelimb lower skeleton are correspondingly arranged, and the included angle between the forelimb upper skeleton and the forelimb lower skeleton is gradually reduced in the contraction movement; the included angle between the forelimb upper skeleton and the forelimb lower skeleton is gradually increased in the stretching movement. The included angle between the forelimb upper framework and the forelimb lower framework of the forelimb structure is continuously reduced in the contraction movement, water resistance in the movement is effectively reduced, the included angle between the forelimb upper framework and the fore