Mangrove wetlands are extremely important in South China′s coastal eco-environment systems. The current domestic researches focus mainly on mangrove wetland′s ecosystem function and the bioavailability of heavy metals in mangrove′s sediments, while there are few researches about the bioturbation of mangrove plants and crabs which are important to habitat transformation in mangrove ecosystem. This article summed up the effects of mangrove roots and crabs′ bioturbation on the physical and chemical properties of sediments, AVS, migration and transformation of heavy metals in sediments. We have introduced the mangrove roots and crabs′ bioturbation on sediment structure, oxygen content, organic matter, AVS, heavy metals and Fe/S′ geochemical behavior in details. Basing on the effects of roots and crabs′ bioturbation on AVS which is considered one of the most significant binding states of heavy metals in sediments, the linkages between these factors are preliminarily discussed. This article could be seen as a theoretical reference for further scientific research about bioturbation, AVS and heavy metals’ geochemical behavior in mangrove sediments.