Radioelement content, rock density and rock thermal conductivity of drill hole samples within Douzhashan pluton of northern Guangxi were analyzed. The results suggest that the average U, Th and K₂O values of the investigated granites are 17.49×10^-6, 27.54×10^-6 and 4.64%, respectively. The average value of rock density is 2.57 g/cm³, which is in good agreement with the average density of granites in the world. The average radiogenic heat production of the investigated granites is 6.46 μW/m³, which is obviously higher than that of crustal rock and most plutons in South China. The main heat production contribution is sourced from the decay of U and Th, and the U plays the most important role. The average rock thermal conductivity is 3.389 W/mK, close to that of the middle-upper crustal rocks. Combined with the previous data around the study area from previous researchers, this paper indicates that the crust contributes more heat flow to the surface than the mantle, thus the area of Miao'ershan and northern Guangxi is a typical region with cold crust and hot mantle type lithospheric thermal regime. Based on the advantages of radioelement content and radiogenic heat production, the authors hold that the Douzhashan pluton has a great exploration potential as hot dry rock resource, and hence more further work is needed in the future.