Marxist sociology refers to the application of Marxist epistemologies within the study of sociology.[1] It can often be economic sociology, political sociology or cultural sociology. Marxism itself is recognised as both a political philosophy and a social theory, insofar as it attempts to remain scientific, systematic, and objective rather than purely normative and prescriptive.
This approach would come to facilitate the developments of critical theory and cultural studies as loosely distinct disciplines. Marx himself has been considered a founding father of sociology.
https://en.wikipedia.org/wiki/Marxist_sociology