B code time synchronization system and method for acquisition execution unit host and slave

The invention belongs to the technical field of B code time synchronization, and particularly relates to an acquisition execution unit host and slave B code time synchronization system and method. The acquisition execution unit comprises a host and a plurality of slaves; according to the host, a code element receiving module receives and processes input B code data, and a code element type identification module identifies code element types; the B code time information verification module is used for calculating odd check bits of the received B code data and judging whether a calculation result is consistent with the received odd check bits or not; if yes, the host judges whether the B code is lost or not, and if the host judges that the B code is not lost, the host generates B code timing sampling pulses and synchronizes the B code timing sampling pulses to the slave; if the B code of the host is lost, the host generates a B code punctuality sampling pulse and synchronizes the B code punctuality sampling pul