NOVELTY - The system has a cold water pipe (21) with a water intake pipe (41) whose end is coupled to a fixing portion of a water intake head (31), where the intake pipe is formed by connecting composite pipes (42) in series. A connecting pipe (51) is formed by sheathing an outer pipe (52) with an inner pipe (53). An end of the outer pipe has an engaging portion connected to a connecting portion i.e. L-shaped connecting portion, of the water intake pipe. Buoys of the connecting pipe are installed on the outer pipe and the inner pipe. A set of steel ropes is wrapped with polyethylene resin.    USE - Submarine cold water pipe water intake system for an ocean thermal energy conversion power plant.    ADVANTAGE - The system has a powerful structural strength for bearing with the deep sea currents and preventing damages. The water intake pipe is formed by connecting the composite pipes in series, thus simplifying a manufacturing process and reducing a manufacturing price of the intake pipe, while effectively avoiding a direct attack of currents of the seawater by the flexible pipe wall. The system utilizes a surge tank for filling water into a wavy inner pipe of one of the composite pipes to expand the pipe wall of the composite pipe and reinforce the structural strength of the composite pipe, such that the system effectively resists the pressure exerted from different directions. The composite pipe is formed by flexible wavy inner pipes, and is wrapped with a powerful watertight fabric around internal and external peripheries of the pipe wall, so that the composite pipe has the flexible and bendable properties, and the volume of the system is compressed effectively for the transportation. The inner pipe is extended and retracted in the outer pipe, so as to improve the draught of a power boat at sea surface after the power boat is connected to the inner pipe, thus making the power boat to carry out the electric power generation at the sea surface more stably. The system has a set of sinking caissons installed under the power boat for effectively enhancing the stability of the water intake pipe below sea surface and the power boat at sea surface. The connecting pipe is formed by sheathing the outer pipe and the inner pipe, and includes the buoys installed on the outer pipe and the inner pipe, so that the inner pipe is sheathed into the outer pipe, when the inner pipe flows at sea level, and the inner pipe is extended or retracted along the outer pipe to prevent the vertically up and down shaking effects of the waves on the inner pipe.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a submarine cold water pipe water intake system of an ocean thermal energy conversion power plant.    Power boat (10)    Cold water pipe (21)    Water intake head (31)    Water intake pipe (41)    Composite pipes (42)    Connecting pipe (51)    Outer pipe (52)    Inner pipe (53)