Channel access method and device and storage medium

A channel access method and device, and a storage medium, the method comprising: a first communication device obtaining a first message to be sent, and then executing an intelligent distributed coordination function IDCF access process for a shared channel. If collision occurs in the IDCF access process, the first communication device counts the number of times of continuous collision; when the count value reaches the maximum number of collisions Nmax, the first communication device performs backoff, the Nmax being a positive integer greater than 1; and when the first communication device confirms that the backoff duration is greater than or equal to the first backoff duration, the first communication device sends the first message to the second communication device through the shared channel. In this way, backoff is performed when the shared channel is continuously occupied, thereby preventing greedy occupation of the channel by the AI-based channel access method.