Tightening device for cable installation for ocean engineering

The invention belongs to the technical field of cable installation, and relates to a tightening device for cable installation for ocean engineering. The main body comprises a main body and a second T-shaped sliding block, the main body is provided with a cable cavity for placing a cable, the left side of the main body is provided with a T-shaped sliding groove, and the right side of the main body is fixedly connected with a first T-shaped sliding block; a sliding cavity is formed in the main body, penetrates through the first T-shaped sliding block rightwards and communicates with the T-shaped sliding groove leftwards; a sliding piece is slidably arranged in the sliding cavity, and a limiting groove is formed in the left end of the sliding piece. A tightening assembly is arranged on the left side of the cable cavity, a third sliding groove communicating with the cable cavity is formed in the inner wall of the sliding cavity, and one end of the tightening assembly penetrates through the third sliding groove to