There has not been an effective method to measure the resistivity of small-size sample of mineral and solid insulating material until now.According to the Chinese National Standard(GB/T1410-2006) and features of digital high resistance meter,a small electrode experimental installation was developed;it can work with current high resistance meter;the sample decreases to 18 mm from standard size 100 mm in diameter and reduces by 30.86 times in area.A three-electrode system is supported and precisely positioned by two insulating bases whose diameter is 60 mm and height is 20 mm,which ensures accuracy of device structure and reliability of measuring results.The key technological parameters are as follows:diameter of high voltage electrode is 18mm;diameter of measuring electrode is 14.6 mm;internal diameter and external diameter of guard electrode are 16 and 18 mm,respectively;the gap between guard electrode and measuring electrode is set at 0.6 mm.These parameters are adequate for the measurement of flat specimen of mineral and solid insulating material whose diameter is 18 mm.According to the confirmatory experiment on the volume resistivity and surface resistivity,the measuring results are almost the same,using a small electrode experimental installation and a standard electrode. There has not been an effective method to measure the resistivity of small-size sample of mineral and solid insulating material until now. According to the Chinese National Standard (GB / T1410-2006) and features of digital high resistance meter, a small electrode experimental installation was developed; it can work with current high resistance meter; the sample decreases to 18 mm from standard size 100 mm in diameter and reduces by 30.86 times in area. A three-electrode system is supported and precisely positioned by two insulating bases whose diameter is 60 mm and height is 20 mm, which ensures accuracy of device structure and reliability of measuring results. The key technological parameters are as follows: diameter of high voltage electrode is 18 mm; diameter of measuring electrode is 14.6 mm; internal diameter and external diameter of guard electrodes are 16 and 18 mm, respectively; the gap between guard electrode and measuring electrode is set at 0.6 mm. These parameters are adequate for the measu rement of flat specimen of mineral and solid insulating material whose diameter is 18 mm. Accredited to the confirmatory experiment on the volume resistivity and surface resistivity, the measuring results are almost the same, using a small electrode experimental installation and a standard electrode.