IMA processor system clock synchronization method

The invention relates to an IMA processor system clock synchronization method. The method includes the following steps that: 1) after powering on, physical timer signals are selected as initial reference time, and satellite clock signals and data link clock signals are selected as corrected reference clock signals in the work process of time servers, and one kind of signals selected from the satellite clock signals and the data link clock signals are adopted as timekeeping circuit reference clock; 2) the time servers carry out timekeeping, generates time information required by a system, and distributes the time to various subsystems and functional modules through an FC network; 3) human-computer interface input is carried out; 4) FC network time synchronization is carried out: the FC network time synchronization is realized through FC network time synchronization primitive; and the IOM module time servers complete time services between an IMA processing system functional module and the other system equipment through the FC switching network; and 5) 1553B bus clock synchronization is carried out. The IMA processor system clock synchronization method provided by the invention meets the requirements of high time synchronization accuracy, small synchronization time delay and high time synchronization reliability, and is suitable for the clock synchronization of a new-generation aircraft high performance task system.