The invention provides an anisotropy parameter linkage time depth conversion method and belongs to the oil gas geophysical exploration earthquake data processing field. The method comprises steps that (1), earthquake data such as a CMP trace gather and isotropy medium depth domain layer speeds VPO is prepared; (2), the given offset distance depth ratio is 1, isotropy normal dynamic correction speed scanning on the data having the offset distance depth ratio smaller than 1 in the CMP trace gather is carried out to acquire equivalent Vnmo of a time domain; (3), horizontal speed or non-ellipticity value scanning on the data having the offset distance depth ratio greater than 1 in the CMP trace gather is carried out to acquire equivalent horizontal speed Vh of the time domain or equivalent non-ellipticity eta of the time domain; (4), DIX conversion on the data acquired in the step (2) and the step (3) is carried out to acquire interlayer Vnmo of the time domain, interlayer Vh of the time domain or in-layer non-ellipticity eta of the time domain; and (5), time depth relation is established; and (6), time depth conversion is carried out.