虎牢关是古代中原名关,对其关址兴废易徙及其与地理条件的相互关系问题,近世学者多语焉不详。根据文献记载与实地考察,历史上的虎牢关、成皋关是二关而非一关;受黄河侧蚀的影响,虎牢旧关址发生过变化,后迁徙至今汜水镇,即汜水关。虎牢、汜水应为一关二名;虎牢关关址的变迁与交通条件的变化有密切关系。 Hulao Guan is the ancient name of the Central Plains, the relocation of its customs Xing and its relationship with the geographical conditions of the problem, many scholars in the world do not elaborate. According to historical records and site visits, Haguan Customs in the history and Chengguguan are the second level rather than the first level. Due to the influence of the Yellow River erosion, the old site of Hulao County has changed and migrated to Lishui Town since then, Water level. Tiger prison, boil water should be one off two; Hulan off customs change and traffic conditions are closely related.