Objective To study the characteristics of dyslipidemia and phenotyping of hyperlipidemia.Methods The four lipid items and LP(a) level of 1 500 cases of the professional population were investigated.The characteristics of dyslipidemia and phenotyping of hyperlipidemia were studied.Results Only 45.2% had suitable TC,TG,LDL-C and HDL-C levels,and 53.0% had suitable TC and TG levels in all subjects.The detection rate of hyperlipidemia type Ⅱa(10.7%) was more higher than that of type Ⅳ(5.6%) and type ⅡB(1.3%).The detection rate of simultaneous high Lp(a) and LDL-C of young males was significantly higher than that of females.There wasn't statistical difference of the detection rate between males and females in other age groups.Conclusion Lipid reduction treatment should be emphasized on regulating TC and LDL-C levels.Postmenopause females and young males should pay attention to earlier prevention and treatment of dyslipidemia.