A physical downlink control channel blind detection method, a user equipment and a readable storage medium are provided. The method includes: receiving an issued first Radio Resource Control (RRC) signaling to determine an Aggregation Level (AL) of the PDCCH; receiving an issued second RRC signaling; determining a specific position of each CCE in the CORESET based on the configuration information in the second RRC signaling; determining positions of all PDCCH candidates, and obtaining a target PDCCH by blindly detecting the PDCCH; and obtaining a mapping position of a Downlink Control Information (DCI) corresponding to a UE at a time domain sampling point by blindly detecting the time domain sampling based on the target PDCCH.