From the EU-Korea free trade agreement to the China-EU comprehensive investment agreement, the EU has incorporated labor provisions into the sustainable development chapter and used a relatively soft mechanism to promote the contracting parties to adhere to labor standards. However, it has been criticized as having little effect in practice. Therefore, the EU intends to strengthen the clauses’implementation. It initiated the EU-Korea FTA labor clause dispute case, and launched the mechanism of the panel of experts for the first time. The case clarifies that the panel of experts can accept disputes over the core conventions of the International Labour Organization, which strengthen the obligatory constraints of core labor standards. Influenced by the case, South Korea revised its domestic legislation and ratified the relevant core conventions of the International Labour Organization. To cope with the risk of disputes over labor clauses of China-EU Comprehensive Agreement on Investment, China should speed up revising legislation and practices inconsistent with the core conventions of the International Labor Organization and promote the ratification process of relevant core conventions. In addition, China should also enhance the selection and training of legal talents in the field of international labor and attach importance to the role of“amicus curiae”.