Disclosed are a competition-based resource selection method and device. The method includes that: a first interception result is received in a (n+1)th time domain unit, the first interception result at least including channel occupation information and/or collision information in a nth time domain unit; and a time-frequency resource for data sending is selected according to the first interception result, where n is 0 or a positive integer. The present disclosure also discloses a computer storage medium.