Abstract: Based on the available knowledge of pollution ecology of mangrove,combined with the data on tideland pollution in Guangdong Province,the paper conducts a scientific judgment on whether some polluted tidelands in this Province can be sued for establishing mangrove plantations or not so as to provide a scientific guideline for selecting the species to suit a tideland or selecting a tideland to suit the species in constructing ecological and public welfare mangrove system along the coast of the Province at present.Moreover,it also expounds the necessary scientific procedures to be adopted in establishing mangrove plantations on polluted tidelands and puts forward several important problems which must be solved as soon as possible and the primary ideas to find a new branch of silviculture——pollution silviculture of mangrove.It is concluded from the study and analysis that the tidelands listed in the table 1～4,which are suffered from oil-pollution,can not be used for establishing mangrove plantations before some effective purifying measures are taken or oil resistant species are selected out or in the case of that oil-pollution is still taking place,especially the sites where oil content of seawater is higher than that of the third class seawater quality in national standard and where both the seawater and soil are polluted by oil;and that afforestation on the tidelands in which the soil was polluted by Cu and Zn has to be acted with a prudential policy.