Soil resistivity measuring method

The embodiment of the invention discloses a soil resistivity measuring method comprising the following steps of: distributing a first ground pile, a second ground pile, a third ground pile and a fourth ground pile on the same line and driving the ground piles into the ground, wherein the distance between the first ground pile and the second ground pile is set to be equal to the distance between the third ground pile and the fourth ground pile; setting the depths of the first ground pile, the second ground pile, the third ground pile and the fourth ground pile driven into the ground to be same and 1/20 smaller than the distance between the first ground pile and the second ground pile; connecting the anode of a power supply with the first ground pile, and the cathode with the fourth ground pile, wherein the power supply has a set frequency difference with the power frequency; acquiring a resistance value between the third ground pile and the fourth ground pile; and calculating the resistivity of the soil by taking the distance and the resistance value between the first ground pile and the second ground pile as well as the distance and the resistance value between the third ground pile and the fourth ground pile according to a preset formula. According to the embodiment of the invention, the size of the measured power supply is reduced effectively, and the work intensity of a tester is relieved.