If we understand the evaluations in the works of modern western history of economic thoughts on Engels and his economic thoughts, we can grasp his economic thoughts and their status and roles in Marxist economics in an all - round way, and then further understand the status of Engels in the history of the development of economic thoughts. First, this article introduces the views of western economists on Engels and the status and roles of his thoughts in Marxist economics from several aspects, such as the introduction of Engels, the source of his thoughts, his influence on Marx and his thoughts...