The invention relates to a melt spinning head for a multi-composition hollow fiber composite membrane, which comprises a temperature measurement sensor, a bottom plate, a pressure plate, a cover plate, two gaskets and a heating sleeve, wherein the bottom plate is provided with a joint 1 for receiving fused high polymers, namely a first composition from a first spinning machine; simultaneously the bottom plate is matched with the pressure plate to form a spinning opening 1 which is communicated with the joint 1; the first composition, namely the fused high polymers, is sprayed out from the spinning opening 1 to form an inner layer of the hollow fiber composite membrane; the pressure plate is provided with a joint 2 for receiving fused high polymers, namely a second composition, from a second spinning machine; the pressure plate is matched with the cover plate to form a spinning opening 2 which is communicated with the joint 2; the second composition, namely the fused high polymers, is sprayed out from the spinning opening 2 to from a second layer of the hollow fiber composite membrane; by analogy, the spinning head can form a multi-composition spinning head in a mode of adding more pressure plates; and the whole spinning head is connected by bolts through connecting holes. The spinning head can realize the one-step forming of the hollow fiber composite membrane by multi-composition high polymers, and (two or various) high polymers with different melting points are subjected to membrane wire spinning. Simultaneously, a pedestal and the pressure plate and the pressure plate and the cover plate are matched with each other in virtue of sub-openings to guarantee the concentricity, so that the concentricity of a core bar of the cover plate, the spinning opening 1 and the spinning opening 2 is guaranteed; and the wall thickness of the formed hollow fiber composite membrane is uniform.