The invention discloses a portable power detection apparatus. The portable power detection apparatus comprises a casing whose front side surface in contact with a human body is made of nylon; a case cover; a waistband; a touch display screen which is fixedly connected with the outer wall of the top portion of the case cover and is electrically connected with a host; an alarm which is arranged at a corner of the outer wall of the top portion of the case cover and is electrically connected with the host; a power supply which is arranged in the casing, is closely attached to the rear side surface of the casing and supplies power to the host and the touch display screen; a solar charging panel which is fixedly connected with the outer wall of the rear side surface of the casing and is electrically connected with the power supply; a laser range finder in signal connection with the host; an ultrasonic detector in signal connection with the host; two telescopic universal pipes; a form pad filling residual space inside the casing and is respectively provided with multiple grooves; and an installation plate. The portable power detection apparatus has the advantages of simple structure, reasonable design, high portability, high intelligence and safety and the like, thereby being applied to inspection of a field high-voltage power transmission line.