The invention discloses a retransmitting method of supporting policy routing and a device thereof. The method comprises the following steps: a next hop ID is distributed to the next information of the policy routing, the corresponding relationship between the next information and the next hop ID is synchronized on an interface plate and a business plate; the interface plate carries out the policyrouting on a retransmitting message so as to obtain next hop information; the next ID which is corresponding to the next information is transmitted to the business plate, wherein, the next ID is carried in the message; the business plate resumes the next information which is corresponding to the next hop ID according to the corresponding relationship so as to retransmit according to the resumed next information. The invention can support policy routing descend hierarchy business without configuring and reexecuting the policy routing function on the business plate.