Time frequency transfer method and receiver based on multiple global navigation satellite system (GNSS) integration

The invention provides a time frequency transfer receiver based on multiple global navigation satellite system (GNSS) integration, which comprises a plurality of GNSS receiving modules, an external clock source and a controller, wherein the controller uniformly synchronizes the reference times of the plurality of GNSS receiving modules to a local reference time frequency standard source to acquire a plurality of time frequency measuring signals of the plurality of different GNSSs, substitutes one or more measured values in measuring coarse codes, precise codes and carrier phases of each GNSS into an observation equation for processing to obtain the local reference time relative to each GNSS time, endows the local reference times relative to each GNSS time with corresponding weights, acquires the difference between the local reference time of a single station and a universal time coordinated (UTC) time after weighted average, and acquires the common-view data of the local single station after processing. The e