두 개의 계약 신학(Two covenant theology) 혹은 이중 언약(Dual-covenant theology)이란 그리스도인들이 구약성경이라고 부르는 히브리 성경을 관련하여 주장한 것이다. 일부 그리스도인들은 구약성경이 대체되었거나 폐지되었으며 오늘날 유일한 신약성경인 새 언약으로 대체되었다고 주장한다. 대체주의 신학이라고 볼 수 있다.

• 대체주의

• All in the Family: Christians, Jews and God Archived 2009년 9월 5일 - 웨이백 머신
• Jerusalem Post: Mar 2, 2006: Hagee, Falwell deny endorsing 'dual covenant'
• Journal of Lutheran Ethics: Jewish-Christian Difficulties in Challenging Christian Zionism by Robert O. Smith: "...sometimes referred to as “dual covenant” theology. Any other understanding of the relationship, Christian Zionists argue, is a variation of supersessionism."
• Ignatius Insight interview of Roy H. Schoeman Archived 2008년 4월 6일 - 웨이백 머신: "This "dual covenant" theology seems to have been adopted to avoid the intrinsic, basic conflict at the heart of the Jewish-Catholic dialog. That is that either the Catholic Church is itself the continuation of Judaism after the coming of the Jewish Messiah – i.e., the Church is post-Messianic Judaism – or it is nothing at all."
• What is dual-covenant theology Archived 2011년 10월 2일 - 웨이백 머신: An article by 'Catholics for Israel' opposing dual-covenant theology and comparing it to supersessionism and to the Catholic position.
• THE PONTIFICAL BIBLICAL COMMISSION: THE JEWISH PEOPLE AND THEIR SACRED SCRIPTURES IN THE CHRISTIAN BIBLE
• Jewish Tribune: 23 September 2009: A precarious moment in Catholic-Jewish relations