Abstract: By virtue of the advantages of data, technology and capital, the platform field represented by the online car-hailing market is showing a trend of increasing market concentration and accelerating the concentration of market resources to the top platforms. The“winner takes all”effect is quite significant, and the consequence of the unordered competition is worrying. The disorderly expansion of capital in the online car-hailing market has also incurred questions and accusations on market regulators and operators, such as regulatory arbitrage, data collection infringement of privacy, algorithm discrimination and using big data to cheat the acquaintances, platform data monopoly, etc. The regulatory system of the online car-hailing market is in urgent need for reshaping. The policy makers should re-examine the platform supervision and competition issues in the digital economy. The possible anti-competitive risks probably resulted from the underestimated pricing of the current laws and the cross-industry integration have become prominent. The regulation of the online car-hailing market should take the anti-monopoly law as a starting point, strengthening the requirements for algorithm transparency, increasing competition advocacy and updating anti-monopoly analyzing tools, standardizing platform behaviors, promoting the development of the market in accordance with the law, and giving a better play to the role of the government.

Key words: online car-hailing, platform economy, market regulation, anti-monopoly