Asynchronous communication data sampling method, device, equipment and medium

The invention provides an asynchronous communication data sampling method and device, equipment and a medium. The method comprises the following steps: carrying out successive time delay processing on original communication data to obtain first to fourth communication data after sequential time delay; extracting data change signals in the original communication data, and extracting corresponding data change signals in the first communication data and the third communication data to construct change detection signals; in a system clock domain, selecting second communication data or fourth communication data as a sampling data source for data sampling according to a time sequence relationship between the current sampling signal and the change detection signal; on the premise of ensuring the data sampling accuracy, the asynchronous communication process can be realized without performing frequency division processing on the counting overflow rate, so that the reduction of the communication transmission rate caus