虎门在鸦片战争中曾起过重要作用。据陈坤《粤海炮台图说》称:“虎门为粤东天险,炮台之设,所以御外侮而固疆圉也。伶仃洋外,一望无际,由伶仃洋而进,东西有沙角大角之险,两山对峙中横一海,其势大若门焉。由此而进,海分二道,东入三门,其山左右雄峙,进逼水口,西入横挡,上下二山犄角扼中流之冲,东距三远二里半而距巩固二里半,其山与虎山毗连,逾此海道复合为一,大虎接当其冲,狮子洋承其险要,合而视之,从伶仃洋至狮子洋险道百余里,重重扼 Humen played an important role in the Opium War. According to Chen Kun, “Guangdong Fort Battery Map” said: "The Humen is an innate danger in the eastern part of Guangdong Province and a fort that is located in the eastern part of Guangdong Province. Therefore, there is a vast expanse of boundless territory outside the Lingdingyang Sea, Two mountain confrontation in a cross-sea, the potential if the door Yan .Therefore, the sea points two, east into the three, the mountains around the male Zhi, into the nozzle, the west into the block, Red, three miles from the east two and a half away from the consolidation of two and a half, the mountain and the Hushan adjacent to more than a combination of the sea, the tiger bear the brunt of the lion bearing its risk, combined with the vision, from the Lingding Ocean to the lion Ocean Road hundred, heavy emphasis