The invention discloses a paper pouring gate pipe component for casting cast steel. The paper pouring gate pipe component is prepared from the following raw material in weight percentage: 1 to 70% of inorganic sintered powder material, 1 to 40% of organic fiber, 1 to 20% of inorganic fiber, 1 to 25% of thermocuring material, 1 to 10% of binding agent, 1 to 5% of waterproof and dampproof agent, 1 to 5% of enhancer and filter aid, 1 to 5% of fluxing agent and 0 to 5% of flame retardant, wherein the inorganic sintered powder material is combination of any several kinds of mullite, high-aluminum clay, attapulgite, montmorillonite, bentonite, high-aluminum powder, quartz, volcanic rock and graphite. The paper pouring gate pipe component has no effects of recarburization, decarbonization, carburization and the like on iron, so that chemical ingredients and material performance of cast steel raw materials are prevented from being changed. The paper pouring gate pipe component has the advantages of light weight, easiness to operate, small waste after cast pouring, labor saving, time saving, energy conservation, environmental friendliness, no environmental pollution, environmental protection and the like; in addition, the waste is easy to treat.