The invention discloses a portable power distribution product transmission calibrator, which comprises an upper function module and a bottom function module connected to external inspected equipment, and is characterized in that the upper function module comprises an upper computer core control module, external input and output equipment, a display device and an external interface module, wherein the external input and output equipment, the display device and the external interface module are connected with the upper computer core control module; the bottom function module comprises an external test interface, a function switching module connected with the external test interface and an operation voltage and current signal acquisition module, a location signal acquisition module and a function switching module which are respectively connected with the function switching module. The invention further provides an inspection method implemented based on the calibrator. The inspection method comprises the steps of power distribution terminal calibration, power distribution switch calibration and complete equipment transmission calibration. The portable power distribution product transmission calibrator realizes verification for functions and performance of power distribution terminal equipment through the standardized test interface and simple wiring operations.