[Objectives] Research on subadults can provide a more comprehensive understanding of a species and a more effective protection work. To adequately protect the Black-necked Crane (Grus nigricollis), a threatened wetland bird on the Tibetan Plateau, according to Johnson's research, we conducted a survey in the Danghe wetland in Yanchiwan (Fig. 1) from early July to mid-August 2020 to study the home range and microhabitat scale habitat selection of subadult Black-necked Cranes. [Methods] The kernel density estimation was used to estimate the home range, then home range scale selection was studied using Manly selection ratio design III, and the area of each habitat type and the locations of Black-necked Cranes were obtained using remote sensing image interpretation and satellite tracking, respectively. The microhabitat scale selection was performed by selecting utilization and control samples and then comparing the data of samples using the one sample Kolmogorov-Smirnov test, χ2 test, independent samples t-test and Mann-Whitney U-test. [Results] In the third-order selection, river (?i = 5.12, CI was 2.92﹣7.32) was preferred, lake (?i = 0.00) was not being used, gobi (?i = 0.16, CI was 0.00﹣0.35) and swamp meadow (?i = 0.64, CI was 0.51﹣0.78) were rejected, and swamp (?i = 0.83, CI was 0.58﹣1.09) was neither selected nor rejected by subadults (Table 2), and the subadults are wandering around the river (Fig. 2). In contrast, adults selected lake (?i = 3.11, CI was 1.80﹣4.43) without using river (?i = 0.00), while adults rejected gobi (?i = 0.05, CI was 0.03﹣0.06), mountain (?i = 0.07, CI was 0.01﹣0.14), swamp meadow (?i = 0.21, CI was 0.10﹣0.32) and salinization meadow (?i = 0.18, CI was 0.01﹣0.35), and neither selected nor rejected swamp (?i = 1.22, CI was 0.92﹣1.53) (Table 2). In the microhabitat scale selection, microhabitats with an average vegetation cover of 57.07% ± 4.53% (Table 3), matrix type of peat (χ2 = 10.248, df = 1, P < 0.05), intermediate matrix (χ2 = 22.483, df = 2, P < 0.05), and dominant vegetation (χ2 = 19.419, df = 5, P < 0.05) of Carex atrofusca were selected by subadults. Harder matrix (χ2 = 9.875, df = 2, P < 0.05), closer to road and further from house, river, mountain and lake were the habitats selected by subadults compared to adults (Table 4). [Conclusion] The habitat selection of subadults is mainly affected by factors such as habitat quality, habitat resources limitation and habitat selection of adults. Under the influence of these factors, the separation of ecological niche and the differentiation of habitat selection occurred between subadults and adults. This differentiation is beneficial to both subadult survival and adult reproduction, avoiding ineffective intraspecific conflict and competition, and facilitating increased fitness of subadults and adults. Habitat protection of Black-necked Cranes needs to consider the habitat selection of subadults and their survival.