The Belle II detector at the SuperKEKB collider is a general purpose spectrometer to study meson, charm hadron and lepton decays with an unprecedented high luminosity of cm. At Belle II, detector signals are digitized inside or near the detector and collected via high-speed optical serial links. The maximum design trigger rate is 30 kHz, for which we have to record data from 7 subdetectors with a minimum dead-time fraction. Due to complex constraints in the front-end electronics of the Belle II subdetectors, a straightforward dead-time control method does not meet our requirement. We report a pipelined trigger flow control scheme which will keep the dead-time fraction due to the trigger distribution and readout system to about 1%.