The invention discloses a robot for searching for and fishing physical evidence in a deep water environment and belongs to the technical field of criminal investigation. The robot mainly comprises a robot trunk, a drifting propeller, a first LED lamp, a second LED lamp, a third LED lamp, a fourth LED lamp, a first mechanical leg, a second mechanical leg, a third mechanical leg, a fourth mechanical leg, a wide-angle camera, a first manipulator, a second manipulator, a storage cabin and the like, wherein the first mechanical leg and the second mechanical leg are installed on the left side of the robot, the third mechanical leg and the fourth mechanical leg are installed on the right side of the robot, the drifting propeller is located in the middle of the upper end of the robot, the wide-angle camera is located at the front end of the robot, and the first manipulator and the second manipulator are located on the right side and the left side of the lower end of the wide-angle camera correspondingly. The robot performs physical evidence search work underwater and fishes physical evidence needing to be fished through the manipulators, the efficiency of fishing of underwater physical evidence is improved, and accordingly the robot assists public security officers in improving the case cracking efficiency. Moreover, the robot is simple in structure and convenient to operate.