K. Marx' theoretical heritage is analyzed within the framework of Marxist psychology of politics. Such issues as the personality and politics, the structure of revolutionary activity, political consciousness and view of the world, political typology of personalities, political control, class, national, and religious psychology in relation to politics - are considered. A conclusion is made that K. Marx' ideas may serve as a methodological basis for concrete studies of a number of political-psychological problems which is of great practical significance for the communist and revolutionary movement, for providing proletariat and his parties with the knowledge that can be used in the political and ideological struggle with the class enemy.