The utility model discloses a micro-resistivity scanning imaging well logging device and an emitting circuit of the micro-resistivity scanning imaging well logging device. The emitting circuit comprises a filter module, a power amplifier module, a voltage boosting module, a current measuring module and a voltage measuring module, wherein the filter module, the power amplifier module, the voltage boosting module and the current measuring module are sequentially connected in series, and the voltage measuring module is connected in parallel with the current measuring module. The emitting circuit and the micro-resistivity scanning imaging well logging device have the advantages that sufficiently high emitting signals can be output, so that the emitting signals pass through a slurry insulation layer or mud cake between an electrode and a well wall to enter the stratum, and the micro-resistivity scanning imaging well logging device and the emitting circuit are applicable to the micro-resistivity scanning imaging in oil bases or synthetic base slurry.