The invention discloses a portable insulation performance tester for an insulating rod, which comprises a micro-processing chip, a power adapter module, a voltage module, a signal sampling module anda signal amplification module, wherein the power adapter module provides electric energy; the voltage module converts the electric energy of the power adapter module into a voltage signal, the voltagesignal is loaded to the insulating rod, and an input end of the voltage module is electrically connected with a power output end of the power adapter module; a control end of the voltage module is electrically connected with a first output end of the micro-processing chip; an output end of the voltage module is electrically connected with the insulating rod; a first input end of the micro-processing chip is electrically connected with an output end of the signal amplification module; an input end of the signal amplification module is electrically connected with an output end of the signal sampling module; and an input end of the signal sampling module is electrically connected with a sampling jack of the insulating rod. The insulation performance tester disclosed by the invention is convenient to carry and not limited by the application place, can operate outdoors, and effectively guarantees the safety of the test personnel through detecting the insulation performance of the insulating rod.