This study selects 40 typical incidents of domestic and foreign personal information（protection）from January 2021 to December 2021 as the object of analysis. It adopts the research method of rooting theory to examine the current status and characteristics of online personal information and privacy protection in China and the differences between online personal information and privacy protection at home and abroad. The study found numerous privacy leaks in China，a runaway black industry chain of personal information trading，and a gradually improving legal mechanism for personal information privacy protection，but there are still specific risk challenges. Overall，there are problems with protecting personal information and privacy in China，but the overall trend is positive. Based on the above findings，this study proposes specific measures for online personal information protection at five levels：government，industry，family and school，individual，and technology.