Supramolecular fluorescent sensors can address various detection and bioimaging issues related to the environment and human health.Indicator displacement assay(IDA)is a supramolecular fluorescence sensing method that can convert the chemical changes caused by molecular recognition into easily observed fluorescence signals.It provides a unique and innovative sensing method for the detection of analytes.In recent years,IDA based on non-covalent binding has been developed rapidly due to its advantages of high sensitivity,adjustability,real-time,and low synthesis effort.In order to meet the diverse needs of IDA development,a variety of supramolecular macrocyclic hosts have been involved in the construction of IDA sensors,such as calix[n]arenes,cucurbit[n]uril,pillar[n]arenes,etc.The recent research progress in this field based on different classes of macrocycles is briefly reviewed,focusing on the application in biochemical sensing,and providing a reference for the construction and application of novel fluorescent biochemical sensing platforms based on IDA in the future.