Considering the defects of the traditional loop resistance testing insulating, the new insulation rod has been designed, integrating the test line inside the insulating rod and using its outer wall as insulation of current lines, in order to eliminate the tension of testing line on the insulation rods. Simultaneously, the flow capacity and mechanical strength of the insulating rod junction have been guaranteed by selecting material for the connector of the multi-section rod and designing it rationally . The new universal transition connector make the new insulating roa adapt the testing take pliers of different manufacturers; the additional rear protection sets ensure workers are not mistakenly touch live parts in the test process. Additionally , the new test products for insulating rod have been conducted for a comprehensive performance testing and side pilot applications, through the test results , finding the test results are good to meet the requirements of the test loop resistance, stability has been greatly improved, and the site easy to use.