The invention provides a full automatic detection device for dielectric loss and volume resistivity, which is characterized in that an oil discharging opening is arranged at the bottom of a detection cup, and an oil filling opening, an oil spilling opening, a temperature detection head and a signal detection head are arranged at the top of the detection cup; a sample introduction device comprisesa beaker inserted with an oil conduit, a sample introduction tee joint, an oil pump and an exhausting control valve, wherein the three ends of the tee joint are respectively connected with the oil filling opening, the oil conduit inserted into the beaker, and a pipeline provided with the exhausting control valve; an oil conduit provided with an oil spilling sensor and an oil spilling control valve is added; the tail end of the oil conduit is connected with one end of thee oil discharging tee joint, the other end of the oil discharging tee joint is connected with the oil discharging opening ofthe detection cup through the oil conduit provided with the oil discharging control valve, and the third end is used as an oil outlet; and the input end of a CPU is connected with the oil spilling sensor and the signal detection head through a signal processing module, and the output end is connected with the exhausting control valve, the oil discharging control valve, the oil spilling control valve and the control end of the oil pump. During the entire detection process, the invention has the advantages of full automaticity, accurate measurement and high detection efficiency.