A method of manufacturing a fan out wafer level package comprises: preparing conductive projections on an upper surface of a chip; mounting the chip on a carrier with the upper surface of the chip facing upwards; plastic packaging the chip to form a plastic packaging body with tops of the conductive projections being disposed outside the plastic package body; and implementing a redistribution line processing on the plastic package body. With this method, chips can be made small and thin and the manufacturing processes can be simplified.