The disclosure provides a method and a system for channel reservation. The method comprises: a sending station sending a channel reservation request message to a receiving station on a first number of fundamental channels, wherein the first number is an integer greater than or equal to 1, and each one of the fundamental channels is a minimum-bandwidth channel defined in a system in which the sending station and the receiving station locate; the receiving station sending a channel reservation acknowledgement message to the sending station on a second number of fundamental channels, wherein the second number is an integer greater than or equal to 1; and the sending station receiving the channel reservation acknowledgement message, and completing channel reservation with the receiving station. With the disclosure, interference caused by other sending stations can be avoided.