Disclosed are a command execution method based on a command line and a command line operating system, which are used to solve the problem of low working efficiency of the command line operating system caused by a command execution mode of the command line operating system in the prior art. The method comprises: the command line operating system acquiring a command set, the command set comprising at least two commands and a command separator which exist between different commands and can be identified by the command line operating system; and the command line operating system sequentially resolving an executable command comprised in the command set and executing the executable command according to the command separator.