Abstract: By means of polyacrylamide gel electrophoresis, peroxidase isoenzymes of six species of Acer L. were analyzed. The genetic relationship was studied by anglicizing their band distribute and zymogram distance. The result showed that the consanguinity of A. truncatum and A. platanoides ‘Crimson King’ are very close, the consanguinity of both was distanced to the three species of A. negundo, the consanguinity of Acer davidii was far to the others.