Abstract: Fortress Besieged embodies a particular love ethic. Through his laughs at the love entanglement among Su Wenwan, Fang Hongjian, Sun Roujia and Tang Xiaofu, the novelists love ethics is gradually displayed. The three themes of love ethics in Fortress Besieged are revealed through naturalness, as it is and as it should be. The first is the objective description of love, which demonstrates the subjective meaning. The second is the concern about the absurd love fortress, which shows his realistic angel. The third is the pursuit of life hope, which shows his ideal.

Key words: Fortress Besieged, love ethics, three “ran”

摘要： 《围城》体现着特定的爱情伦理。通过对方鸿渐和苏文纨、孙柔嘉、唐晓芙等人爱情纠葛的冷嘲热讽，钱钟书把他坚持的爱情伦理慢慢展示出来。《围城》的爱情伦理围绕本然、实然和应然三个主题展开：一是对爱情困境的客观叙述，表现了其主体意蕴；二是对荒诞的婚姻“围城”的热切关注，表现了其现实维度；三是对人生希望的执著追寻，表现了其理想主张。

关键词: 《围城》, 爱情伦理, 三然逻辑