In order to meet the growing demand for zero-value calibration of Beidou timing system, based on the establishment of Beidou timing link model, the testing mechanism, advantages and disadvantages of five Beidou timing system zero-value calibration technologies are analyzed in depth, and the zero-value calibration experiments are carried out using different Beidou timing systems. The results show that the five zero-value calibration technologies can achieve zero-value calibration of no more than 0.1 ns, 0.9 ns, 1.5 ns, 2.0 ns, 2.8 ns, respectively. They are suitable for different types of zero-value calibration applications such as small quantities of ultra-high precision calibration, small quantities of high accuracy calibration, large quantities of automated calibration, daily patrol calibration, fast and rough calibration, and have good engineering application value.