High-temperature-resistant casting system and preparation method thereof

Provided is a high-temperature-resistant casting system, which comprises casting elements in the following connection relationship: a sprue cup (1) and a down sprue (2) connected with the lower end of the sprue cup, the other end of the down sprue is connected with one end of a filtering element (6), the other end of the filtering element is connected with a three-way pipe (3), the openings of both sides of the three-way pipe is connected with one end of the inlet section of a runner(4), one end of the outlet section of the runner is connected with a reducing bent pipe (5); and the casting element comprises the following components in percentage by weight: 41-51% of refractory fiber, 40-51% of silicate fiber and 5-19% of a binder. And a preparation method of the high-temperature-resistant casting system. The high-temperature-resistant casting system can meet the characteristics of smooth passing of high-temperature molten iron of 1500-1750℃, excellent high-temperature resistance, energy conservation and environmental protection.