In the process of deep water exploration and sampling， the swing or up and down movement of the drill pipe will be caused by the action of ocean current， which is one of the reasons leading to the distortion of obtained samples. The subsea frame is one of the key equipment to improve exploration and sampling offshore through clamping the drill pipe stably in exploration operations to ensure the samples quality. According to the size of the HYSY708 drilling ship and the requirement of exploration operation， a cable-free subsea frame was developed. So far， it has been employed in survey and sampling in the South China Sea and the East China Sea for more than 30 months， providing great support for the marine geological survey in China. In this paper， the working parameters and the principle of the subsea frame， the underwater hydraulic system， and the communication and control system are introduced with focus on analysis of the development of the deep water battery. The battery can ensure the operation time of the subsea frame up to 70h； thus， improving the survey operation efficiency. The product provides a foundation for the future research and development of relevant offshore drilling equipment.