The invention relates to a marine adjustable-pitch all-direction blade pitch feedback mechanism. The mechanism is characterized in that the feedback mechanism using an inner oil pipe of a propeller shaft as a sample point comprises a slider, horizontal links, L-shaped vertical links, a support, a feedback rod, guide rods, a feedback spring, a feedback board mounting base, a feedback board, a universal ball, a pitch feedback rod and a pitch pointer. The slider is connected to the inner oil pipe of the propeller shaft through a ball bearing. The feedback board mounting base and the support are fixedly mounted on a steering column. An intersection fulcrum of two linear segments of the L-shaped vertical links locates on the support. The feedback board mounting base is provided with a limit post and the guide rod. The feedback board is located on the feedback board mounting base. The feedback spring locates on the limit post between the feedback board and the feedback board mounting base. The feedback rod is fixedly connected with the feedback board. The feedback board is fixedly connected with one end of the pitch feedback rod through the universal ball. A pitch sensor is driven on the pitch feedback rod.