Human height is a highly heritable trait in which multiple genes are involved. Recent genome-wide association studies(GWASs) have identified that COL11A1 is an important susceptibility gene for human height. To determine whether the variants of COL11A1 are associated with adult and children height,we analyzed splicing and coding single-nucleotide variants across COL11A1 through exome-targeted sequencing and two validation stages with a total 20,426 Chinese Han samples. A total of 105 variants were identified by exome-targeted sequencing, of which 30 SNPs were located in coding region. The strongest association signal was chr1_103380393 with P value of 4.8 * 10~(-7). Chr1_103380393 also showed nominal significance in the validation stage(P = 1.21 * 10~(-6)). Combined analysis of 16,738 samples strengthened the original association of chr1_103380393 with adult height(P_(combined)= 3.1 * 10~(-8)), with an increased height of 0.292sd(standard deviation) per G allele(95% CI:0.19-0.40). There was no evidence(P = 0.843) showing that chr1_103380393 altered child height in 3688 child samples. Only the group of 12-15 years showed slight significance with P value of 0.0258.This study firstly shows that genetic variants of COL11A1 contribute to adult height in Chinese Han population but not to children height, which expand our knowledge of the genetic factors underlying height variation and the biological regulation of human height. Recent genetic-wide association studies (GWASs) have identified that COL11A1 is an important susceptibility gene for human height. To determine whether the variants of COL11A1 are associated with adult and children height , we analyzed splicing and coding single-nucleotide variants across COL11A1 through exome-targeted sequencing and two validation stages with a total of 20,426 Chinese Han samples. A total of 105 variants were identified by exome-targeted sequencing, of which 30 SNPs were located in coding The strongest association signal was chr1_103380393 with P value of 4.8 * 10 ~ (-7). Chr1_103380393 also showed nominal significance in the validation stage (P = 1.21 * 10 ~ (-6)). Combined analysis of 16,738 samples strengthened the original association of chr1_103380393 with adult height (P_ (combined) = 3.1 * 10 -8) with an increased height of 0.292sd (standard deviation) per G allele (95% CI: 0.19-0.40) Only the group of 12-15 years showed slight significance with P value of 0.0258.This study suggests shows that genetic variants of COL11A1 contribute to adult height in Chinese Han population but not to children height, which expand our knowledge of the genetic factors underlying height variation and the biological regulation of human height.