Offshore flexible photovoltaic support anchorage device

The utility model provides an offshore flexible photovoltaic support anchorage device which comprises clamping pieces, a first lock nut, a second sealing rubber ring and a sealing rubber ring, the sealing rubber ring is arranged in the first lock nut, one side in a main body sleeve is provided with the first lock nut, the three clamping pieces are assembled into a conical structure, the other side in the main body sleeve is provided with an anti-loosening nut, and the anti-loosening nut is connected with the first lock nut. The anti-loosening device is reasonable in structure, after the steel strand penetrates through the first lock nut and the clamping piece, the top end of the steel strand abuts against the closed end of the anti-loosening nut for stopping, no gap is reserved, one end of the anti-loosening nut is closed through the closed end, rainwater cannot enter the anti-loosening device, and the anti-loosening device can be used for preventing rainwater from entering the anti-loosening device. The coni