In the era of digital economy,big data has become the core competitiveness of Internet platforms.At the same time,big data is also a"double-edged sword".On the one hand,it injects strong momentum into high-quality economic development,and on the other hand,it also produces market chaos such as"algorithmic discrimination"and"big data killing".These market chaos are the manifestations of unfair competition of big data.There are two ways to regulate unfair competition in big data:big data algorithm design regulation and consumer personal data property regulation.The realization of big data algorithm design regulation requires the establishment of algorithm responsibility system and algorithm responsibility review committee.The realization of the property regulation of consumer personal data needs to establish the hidden identity obligation of consumer personal information of data users,and ensure the right of consumers'personal information to be forgotten.