Sample analysis excitation point positioning device of spark direct-reading spectrometer

The utility model discloses a spark direct-reading spectrometer analysis sample excitation point positioning device which comprises two vertical plates, the two vertical plates are arranged side by side at intervals, and the bottoms of the vertical plates are detachably connected to a spark platen of a spark direct-reading spectrometer; the tops of the two vertical plates are fixedly connected with a top plate; the two transverse lead screw assemblies are arranged side by side in a spaced mode, and the transverse lead screw assemblies are installed on the bottom face of the top plate; the two ends of the longitudinal lead screw assembly are installed on the sliding sleeves of the two transverse lead screw assemblies respectively; the laser emission instrument is mounted on the sliding sleeve of the longitudinal lead screw assembly, and the working end of the laser emission instrument faces the spark platen; the clamp is mounted on the two vertical plates; the sample block is detachably connected to the clamp;