The invention discloses a clock drift compensation method for a real-time Wi-Fi network, and belongs to the technical field of clock synchronization of industrial wireless control networks. The methodcomprises the following steps: designing a wireless network card driving module, wherein the driving module comprises a channel access control module, a link scheduling module, a synchronization module, a timer and a message queue; and in the Wi-Fi network, periodically broadcasting, by an AP, a Beacon frame carrying a TSF time value to a Station, storing, by the Station, a pair of time information, which are respectively the TSF time value of the AP and an arrival time value of the Beacon frame recorded by the Station, and preprocessing the time information by using a TSF synchronization algorithm to perform clock offset compensation, wherein the clock drift compensation is mainly divided into two steps: the first step, calculating a clock drift amount, and the second step, predicting the clock drift amount and performing compensation. By adoption of the method disclosed by the invention, master-slave clock synchronization of real-time Wi-Fi network can be achieved, and meanwhile theproblem of clock drift generated from the clock in the time interval of twice clock adjustments is considered, so that the the synchronization accuracy can be effectively improved.