A pyrazosulfuron imprinted polymer was synthesized by combining the use of reversible addition fragmentation chain transfer polymerization (RAFT) and precipitation polymerization.New conditions of using macromolecular porogen were used to obtain molecularly imprinted polymer (MIP) with better properties from precipitation polymerization.A optimized condition was selected for preparation of MIP with higher surface areas and better retention for the template.Fig 1 shows the scanning electron microscopy (SEM) of imprinted polymers.Fig 2 shows the different binding affinities of the MIP and NIP for pyrazosulfuron.