Based on the CHNS data, this paper applies the two-tier stochastic frontier model to measure the bargaining power between employers and employees in China's labor market. The results show that:firstly, the bargaining power is not equal for employers and employees, for the company with a strong bargaining power leads workers to get less than "fair" wage, while the bargaining power of workers increases with wage ; secondly, over the past ten years, the situation of " strong capital, weak labor" has been not changed; thirdly, the labor marke...