Since 1963

with the requirement of the task under the iron tower

some country have started to research the distributing electric field and its biology effect on power line. In China

someone analyzed the distributing electric field of power line by numerical mathematics without iron tower. This method may cause error. In this paper

the analysis and prediction for the 3-dimension distributing electric field of power line by matrix mathematics with iron tower is provided

the comparison of the computing results with this method with the field testing results showed that these results are effective. These results can be used in the domestic construction of power line communication network in the future.