Ferro-phosphorus aluminum borate whisker preform manufacturing method of the invention comprises the following steps of 1, processing raw material: adopting, by weight, 69-90 parts of aluminium hydroxide, 7-28 parts of boric acid , 0.5-3 parts of ferro-phosphorus, grinding the three materials into fine powder, mixing evenly by using a blender mixer, putting the mixture into a crucible and removing water in the material; 2, pressing and molding a preform blank: according to size, shape and volume fraction of the required whisker preform, determining all press parameters including feed-weight and pressing pressure, putting the processed material into a mould, and pressing and molding the preform blank by using a press machine; 3, sintering at high temperature the preform blank; 4, processing and forming the preform: according to the shape and size of the required whisker preform, turning and processing the preform to a finished product by using a numerical control machine tool. The ferro-phosphorus aluminum borate whisker preform manufacturing method is capable of achieving automation of the aluminum borate whisker preform, and is low in cost, simple in operation, high in production efficiency, and can be applied to pistons, and therefore the cost is reduced.