In recent years，historical nihilism has attempted to endanger the mainstream ideological security of China by deconstructing the laws of historical development，denying the role of class struggle and social revolution， subverting the legitimacy of the ruling status of the Communist Party of China． To cope with this challenge，we must adhere to the Marxist historical materialism to follow the historical law，firmly believe in the historical role of revolution and struggle to resist reformism，and insist on the mainstream consciousness to safeguard the ruling status of the Communist Party of China．