In　this　work,　the　effect　of　doping　with　5%　to　20%　Poly　Zinc　Acrylate　complexes　(PZA)　on　the　MgB2　phase　formation　was　studied.　The　changes　of　the　lattice　parameter　and　the　amount　of　substituted　Carbon,　of　the　microstructure　as　well　as　the　critical　current　temperature　(T-c)　and　the　critical　current　density　(J(c))　of　bulk　MgB2　have　been　studied　systematically.　The　DTA-TG　and　IR　results　show　that　the　PZA　was　decomposed　between　400　degrees　C　and　600　degrees　C　and　the　main　decomposition　products　were　carbonized　polymers　and　ZnO.　The　lattice　parameters　a　in　all　PZA　doped　MgB2　samples　were　decreased　by　different　degrees,　which　indicates　a　gradual　substitution　of　Carbon　for　the　Boron　sites　in　the　MgB2　lattice　structure.　Comparing　with　the　undoped　sample,　the　J(c)　values　of　all　the　doped　samples　were　enhanced　for　about　an　order　of　magnitude　under　high　magnetic　fields.　The　J(c)　value　of　MgB2　sample　with　20%　PZA　doping　and　sintered　at　800　degrees　C　for　1　h　reached　0.8　x　10(4)　A/cm(2)　at　5　k　and　8　T.　TEM　images　reveled　a　considerable　amount　of　second　phase　particles　of　similar　to　5　nm　size　and　high　density　dislocations　were　observed　in　MgB2　grains.