With the development of capitalism, the motives and policies of modern colonialism invading Africa are constantly changing. At first, it accumulated funds for capitalist production, mainly adopting the policy of selling African blacks and plundering African gold. During the period of free capitalism, Africa was mainly changed into a raw material supplier for the development of capitalism. Instead, it concentrated on the policy of prohibiting slave trade, conducting so-called legal trade and opening up crop plantations needed for capitalist production in Europe. During the transition period of imperialism, in order to monopolize the colonies to obtain high profits and hegemony, African territory was divided first, then a direct or indirect colonial rule system was established, and then a super-economic plunder policy was implemented. Enter the colony and visit Baidu.