Abstract: In recent years a group of subaqueous dike swarms have been found in carbonate platformsin Guilin,Nandan ,Lingyun and Leye,Guangxi.Dike swarms are injected into Mid-Late Devoni-an and Late Carboniferous strata;their ages are Early Permian and Early Triassic;their litholo-gies are represented by brecciated limestone and limestone. The appearance of dikes were close-ly related to the break-up of the Late Paleozoic platform.