The research and application status of complex impedance detection technology at home and abroad are summarized. The five types of complex impedance detection methods such as four-arm bridge detection method

voltammetry method

vector impedance method

microwave detection method and pulse reflection method are dicussed

the advantages and disadvantages are analyzed and compared. The key applications of complex impedance detection technology in biomedicine and science

materials and electrochemistry

electrical power and microfluidic chips are listed

and the existing two problems according to the research status are discussed: the highprecision detection technology is costly

and most of the detection equipments are large in size and complicated in operation. Finally

the three development trends of complex impedance detection technology are summarized:emerging complex impedance detection technology shows a growing trend

complex impedance detection technology and equipment requirements show a simpler operation and lower cost trend

and the application field has a multidirectional development trend.