In order to reduce node energy consumption and enhance energy utilization

propose a reprogramming protocol which is based on raptor code（ RC） transmitting power control（ RC-TPC）. It completes data transmission via two stages. The first stage is that each node self-updates its positioning information and the forms the most optimized topology structure. Then it comes to the second stage

by adjusting the transmission power of the starting node and the selecting number of relay node

Sink node selects proper relay nodes so that the transmission power of relay nodes and consumption of RC can be most optimized. Besides

the way of RC transmission reduces the data transmission errors

it also reduces the redundancy of reprogramming so as to ensure the uniform distribution of network load and effectively realizes the energy-saving

which further enhances the life cycle of the whole network.It is elaborated by both theoretical analysis and experimental result that compared with MNP and ATPC protocols

RC-TPC protocols reduces average energy consumption of transmission to 17. 2 %.