本文首先阐释了民法中诚信原则及其价值功能 ,进而分析了由于民事活动与民事诉讼活动的差异性等原因导致在民事诉讼中适用诚信原则必然存在的诸多问题。因此 ,对主张在民事诉讼中适用诚信原则的观点提出质疑。最后提出了自己的见解和立法建议 This paper first explains the principle of honesty and credibility in civil law and its value function, and then analyzes many problems that must exist in the application of the principle of sincerity in civil litigation due to the differences in civil activities and civil litigation activities. Therefore, the author argues that the principle of good faith should be applied in civil litigation. Finally, I put forward my own opinions and legislative suggestions