This paper presents the 210Pb dating of two young stalagmites from the Huanglong Cave which is located at the east margin of the Qinghai—Xizang(Tibet) Plateau influenced by the interaction of the southwest monsoon and the East Asian monsoon. The determination of 210Pb age and the calculation of stalagmite growth rates are based on the 210Pb activity decay with time. The 210Pb activity is plotted against the depth and exhibits an exponential decay with the depth, which indicates that the sample is younger than 100 years and the 210Pb activity comes mostly from the excess 210Pb of the stalagmite. The average growth rates of the two stalagmites determined by excess 210Pb activity are 0.104mm/a (HL021) and 0.143mm/a (HL021), respectively, which is almost in agreement with that from the 230Th dating data, with the average growth rates of 0.105mm/a for HL021 and 0.145mm/a for HL022. The study proves the reliability of the 210Pb dating results of stalagmite in Huanglong Cave and demonstrates that 210Pb dating could be applied in dating of the stalagmite younger than 100 years while 230Th dating could not. This has also great significance in investigating correlation between stalagmites δ18O records and meteorological data, which will provide more definite interpretation on oxygen isotope records of cave stalagmites as environmental indicators. However, the sampling method of largesize drilling with larger dating errors to some extent limits the use of 210Pb dating method in the study of cave stalagmites.