Free space laser communication is a promising technology with numerous advantages, such as high resistance to electromagnetic interference, excellent confidentiality, and fast information transmission rates. It has broad application prospects in both military and civilian fields. However, the application of this technology on ships poses many challenges. For instance, the ship’s motion trajectory and speed cannot be determined precisely, making it difficult to initially align the line of sight. Furthermore, the ship’s motion is strongly affected by waves at sea, causing six degrees of freedom attitude disturbance and making it challenging to maintain stable line-of-sight alignment. To address these issues, we propose a shipborne wireless laser communication line-of-sight stabilization control technology that provides a robust guarantee for ships to establish and maintain stable communication links at sea. Our approach relies on GPS navigation positioning equipment, attitude sensors, and servo turntables to build a shipborne wireless laser communication line-of-sight stabilization control platform. Specifically, we design methods for initial alignment and attitude disturbance compensation of the line of sigh. Our experimental results demonstrate that our method effectively solves the problem of attitude disturbance in shipborne wireless laser communication systems and improves the speed of initial alignment of the line of sight. Overall, our proposed technology offers a promising solution for enhancing the reliability and stability of laser communication systems on ships.