The utility model discloses a liquid cathode glow discharge device capable of being used for measuring metal elements in a solution. The device comprises a liquid guide spray pipe, a metal anode tungsten needle, a base, a waste liquid pool and a three-dimensional adjusting table, the liquid guide spray pipe consists of a liquid cathode stainless steel capillary pipe and a capillary quartz glass pipe; the liquid cathode stainless steel capillary tube is positioned in the capillary quartz glass tube; a V-shaped groove is formed in the upper end of the capillary quartz glass tube, the metal anodetungsten needle is located above the liquid guiding spray tube, the base is fixed to the lower end of the three-dimensional adjusting table, the lower end of the liquid guiding spray tube is fixedlyconnected with the middle of the waste liquid pool, the three-dimensional adjusting table is located between the waste liquid pool and the base, and the three-dimensional adjusting table is used for adjusting the distance between discharge electrodes. According to the liquid guide spray pipe, the stainless steel capillary tube is arranged in the quartz glass tube, so that the driving power can beremarkably reduced, meanwhile, the consumption of a sample is reduced, and the liquid guide spray pipe can discharge at low sample flow and low driving power.