The present invention discloses a portable liquid cathode glow discharge element analyzer, which comprises a sample injection system, a liquid-state cathode glow discharge system, an optical system, and a microprocessor and data processor, wherein the sample injection system is connected with a sample and the sample inlet of the liquid-state cathode glow discharge system, the liquid-state cathode glow discharge system performs electrical arc discharge atomization on the entering sample, the optical system collects the emission spectrum lines generated during the atomization of the liquid-state cathode glow discharge system and transmits to the microprocessor and data processor, and the microprocessor and data processor controls the sample injection system and the liquid-state cathode glow discharge system in a coordinated manner, and performs sample element determination according to the signal transmitted by the optical system. The portable liquid cathode glow discharge element analyzer of the present invention has characteristics of simple structure, easy achieving, reliable performance, accurate determination, and great market potential.