本文利用CFPS 2016、2018、2020三期面板数据，建立双向固定效应模型，探究互联网使用对普遍信任水平的影响。研究表明，使用互联网显著提升了个体普遍信任水平。在采用互联网作为信息渠道的重要程度作为工具变量和广义精确匹配（CEM）进行内生性处理后，结论仍然稳健。研究发现，互联网参与从整体上促进了个体的普遍信任。其中，从信息传播角度，受教育程度越高的个体能够更好地识别互联网中的虚假信息，从而规避其负面影响，增强互联网对信任的促进作用；其他信息媒介通过与互联网的相互替代，削弱了互联网对信任的作用；从风险感知角度，家庭收入越高的个体在面对互联网时风险感知相对较弱，信任水平更高；从社会互动角度，社交态度更加积极、对他人预期更为乐观的个体更能够发挥互联网的社交平台属性，提高社交广度和深度，助力信任水平提升。此外，互联网使用对普遍信任的影响存在性别和年龄异质性，接触互联网后，男性信任提升水平要高于女性，中年龄组信任提升幅度最大，低年龄组信任水平没有显著提升。

This study establishes a two-way fixed effects model to explore the casual relationship between access to internet and the level of generalized trust, using the data of Chinese Family Panel Studies (CFPS).According to the findings, access to internet promotes the level of generalized trust , and those who have higher levels of education, lower reliance on other information channels, better family economic conditions, and greater social enthusiasm are more likely to give full play to the role of internet as information media and social platform,strengthening the positive impact of internet use on generalized trust.The result owns heterogeneity in both gender and age. Men can gain a greater increase of generalized trust via internet engagement than women.Trust levels increase the most in the middle age group through internet participation, while internet usage does not have a statistically significant effect on generalized trust in the youth group.