Introduction   Traditional large-scale enterprises are geographically dispersed， and information investment is insufficient with high security risks. Cloud computing technology effectively integrates enterprise information resources and builds a large enterprise-level cloud platform. It has become the core supporting platform for the digital transformation of traditional large enterprises. Cross-domain resource scheduling and disaster recovery are key technologies.

  Method  Based on the comprehensive application of cloud computing， big data and traditional disaster recovery technology， this paper explored the implementation model of cloud management requirements such as cross-domain resource scheduling and backup disaster recovery in large-scale cross-regional and hierarchical enterprise cloud platforms.

  Result  After the practice test， the construction goal of unified management of multi-site resources of large enterprise cloud platform， unified use of IT resources， and intelligent completion of global resource balance and disaster tolerance was initially realized.

  Conclusion  The cross-domain resource scheduling and disaster tolerance model recommended in this paper has important guiding role for the construction and management of large enterprise cloud platform.