Joseph Xu Honggen (Chinese: 徐宏根; born April 1962) is a Chinese Catholic priest and Bishop of the Roman Catholic Diocese of Suzhou since 2005.

Xu was born in Suzhou, Jiangsu, in April 1962, to a Catholic family.

Two years later, he went to the United States, where he studied at the St. Joseph's College and Catholic Theological Union.

He was ordained a priest in 1990 by bishop Matthias Ma Longlin (Chinese: 马龙麟).

Xu returned to China in June 1999 and that same year became Bishop of the Roman Catholic Diocese of Suzhou, which was approved by the Pope Benedict XVI.