These years public debt has largely been expanded and the financial debt risk has risen. In order to persist development, the active financial policy of 2001 includes increasing public debt. In China, it is the C entral Finance who has big debt risk. Adjusting public debt policy moderately is the way of keeping central financial debt risk away. We can reduce the debt ris k through these measures such as reinforcing foreign loans manage, adjusting int ernal debt's term-structure and holder-structure, perfecting sinkin g fund system, issuing local financial debt,etc.