Recent years have witnessed the increasing popularity of second-hand clothing (SHC) worldwide. In the developed countries, consumers show more willingness to accept SHC and the SHC market is relatively mature. In China, consumers’ attitudes towards SHC is always somewhat negative for many reasons. However, nowadays more Chinese young consumers have intentions to buy SHC partly because they want to follow the global fashion trend or to sustain the environment. To recycle and reuse waste textiles, some regulations have been issued by the Chinese government, but restrictions are still put on trading SHC and it is far from enough to formulate a perfect SHC market. The emergence of online platforms such as Idle Fish and Zhuan Zhuan stimulate the potential market and provide a new channel for trading SHC.As reducing clothing production and waste is one of the solutions to alleviate environmental burden in China, it is necessary to improve Chinese consumers’ buying behavior of SHC. This investigation is concentrated on Chinese young consumers, to gain an insight of how they think of SHC and what factors will influence their purchase behavior. A mixed method was applied in this investigation, which included the semi-structured interview and the self-completion questionnaire. Respondents are mostly from Shanghai and Shandong province, aged between 18 to 24 years old. Factors affecting Chinese young consumers’ buying behavior were assessed in three dimensions: perceived concerns, perceived values and subjective norm. When analyzing the data, comparisons between genders or districts were made. It could be observed that three words ‘unsanitary’, ‘cheap’ and ‘eco-friendly’ are used most by Chinese young consumers to express their views on SHC. Among all the factors, hygiene and safety problem is the biggest concern to a majority of Chinese young consumers. Although SHC is not prevailing in China now, it is likely for them to buy it in the future if platforms can be improved and trading SHC can be supported by the government. Since possible ways of improving buying behavior are only given through Chinese young consumers’ perspective, they should be examined from platform operators’ and government’s point of view in the future research.