Objectives:To investigate the sexual function of male rectal cancer after radiotherapy and ana-lyze enabling factors and explore countermeasures.Methods:A questionnaire survey was designed.62 patients with rectal cancer according with our qualification were inquired.The sexual function pre -and after psychological re -education was compared.Result:After radiotherapy,there were 29 (46.8%)patients of hypophrodisia,20 (32.3%)patients of erectile disfunction,sum accounting for 79.1%.After psychological re -education,the pa-tients of hypophrodisia and ones of erectile disfunction were 19 (30.6%)and 16 (25.8%)respectively.It was significantly different,P <0.025.No significant relation was found between education level or economic status and sexual dysfunction (P >0.9 and P >0.5).However,physical status had a significant impact on sexual dysfunction (P <0.05).In the patients with sexual dysfunction,factors affecting sexual activity included hindering rehabilita-tion of body (42,85.7%);inducing recurrence of rectal cancer (40,81.6%);worrying infection to their wives (28,57.1%);feeling weakness of body not to finish sexual activity (32,65.3%).Conclusions:79.1% pa-tients have experienced changed sexual function after radiotherapy.For these patients,erroneous subjective percep-tion is common,which may play an important role in their sexual dysfunction.Therefore,psychological re -educa-tion after radiotherapy should be paid more attention to.%目的：调查男性直肠癌患者放疗后性功能状况，分析发生性功能变化的可能因素，探讨防治性功能障碍的对策。方法：采用问卷调查方式，对62例符合条件的直肠癌患者进行调查，并将心理干预前后患者性功能状况进行了比对，统计学方法采用χ2检验。结果：直肠癌患者放疗后性欲减退者29人，占46.8％；勃起功能障碍者20人，占32.3％，两者合计达到79.1％。经过心理干预后，性欲减退和勃起障碍的患者均显著减少，分别为19人（30.6％）和16人（25.8％），在统计学上有显著差异，P ＜0.025。从客观因素对性功能影响分析来看，文化程度、经济状况与性功能无明显相关性，分别 P ＞0.9和 P ＞0.5；身体状况对性功能有显著影响，P ＜0.05。从主观因素对性功能影响来看，在性功能改变的患者中，担心妨碍康复占85.7％（42例）、担心性生活引起肿瘤复发占81.6％（40例）、害怕传染给家人占57.1％（28例）、自觉身体虚弱无力完成性生活者占65.3％（32例）。结论：直肠癌患者放疗后有79.1％病人存在性功能改变，而其中部分病人是对性生活的错误认知（即功能性因素）所致，需要心理干预。
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