The invention provides a portable circuit board test bed, and belongs to the technical field of circuit board testing. The portable circuit board test bed comprises a supporting mechanism, a buffering mechanism and a plurality of probes; the supporting mechanism comprises an outer shell, first ventilation openings, second ventilation openings, a first magnet, an inner shell, a first ventilation cavity, a ventilation groove, a second ventilation cavity, annular protruding edges and a mounting table; and the front end, the rear end, the left end and the right end of the top of the outer shell are each provided with the plurality of first ventilation openings; the plurality of annular protruding edges are arranged on the inner side of the outer shell and the outer side of the inner shell; the buffering mechanism is used for providing buffering for an objective table; and the plurality of probes are fixedly connected to the top end of the mounting table. Through cooperation of a miniature ion fan, the ventilation groove, the first ventilation cavity, the annular protruding edges, the second ventilation cavity, the first ventilation openings, the second ventilation openings and third ventilation openings, static electricity carried by the test bed is neutralized, and the static electricity is prevented from damaging a circuit board and the test bed.