The University of Sydney is investigating a string of social media comments racially vilifying international students allegedly posted by a head tutor at the university's School of Business.

Corporate finance tutor Wu Wei has been accused of calling his Chinese students "international pigs" and "chinks" with low IQs in blog posts to the China-based social media sites Weibo and WeChat, first published by USyd news site Honi Soit.

In other online posts obtained by the Sydney University Business Society, the Chinese-Australian PhD candidate, who recently became an Australian citizen, allegedly claims his local PhD students are "far more interesting than the Chinese students".

"A Chinese international pig representative told me that I am a shame [sic] of the Australian-Chinese international community. It is such a pity because I am your tutor of you [sic] international student pigs," according to an English translation of a post written by Weibo user Pekojima.