This paper reviews the historical process of the evolution of Brazilian labor law and labor relations since 1930. On this basis，it examines the labor law reform and labor relations of the Temer government and the new government of Bolsonaro and reveals the role of the judiciary in the reform of the labor law and its impact on labor relation. It is believed that the labor law reform during the Temer government severely damaged the interests of workers. The interests of the employers are publicly above the workers，and in the new government of Bolsonaro，the prospects of the working class are not optimistic. There are some violations of the constitution in Brazil’s current labor law reforms，but the important role of the judiciary in resolving individual and collective labor disputes cannot be ignored.