The abnormal low-density lipoprotein cholesterol (LDL-C) in the development of atherosclerosis is often comorbid in individuals with type 2 diabetes mellitus(T2DM). This study aimed to stratify the cardiovascular risk of T2DM patients individually according to the new guidelines, determine whether the patient achieves the LDL-C goal required by the corresponding risk level, to assess the coronary plaque morphological characteristics in T2DM patients by CCTA, and compared the characteristics of coronary artery plaque in diabetes patients between normal LDL-C group and abnormal LDL-C group on coronary computed tomography angiography (CCTA), to explore whether type 2 diabetes mellitus patients (T2DM) with abnormal low-density protein cholesterol aggravate coronary artery plaque.