The invention provides a multi-material metal electronic work function measuring device, and belongs to the technical field of electronic work function measuring devices. The technical problem of providing a measuring device capable of conveniently measuring electron work functions of metal materials is solved. According to the technical scheme, the multi-material metal electronic work function measuring device comprises ideal diodes of which cathode filaments are made of the metal materials, the output end of a current detector Ia1 is connected with the positive pole of an anode voltage apparatus Ua1 in parallel to be connected with the first input end of a common emitter amplification circuit, the output end of the common emitter amplification circuit is connected with the input end of an analog-to-digital (A/D) converter, the output end of the A/D converter is connected with the input end of a single chip microcomputer, the control end of the single chip microcomputer is connected with a display, and the power supply end of the single chip microcomputer is further connected with a charging device. The multi-material metal electronic work function measuring device is suitable for the field of physical experiment teaching demonstration.