Abstract: As one of the essential nutrients for plant growth, phosphorus plays an indispensable role inthe development of modern agriculture and is in great demand. Since global phosphorus reserves arelimited and phosphorus resources are not renewable, incinerated sewage sludge ash (ISSA) is consid⁃ered to be a potential secondary phosphorus resource due to its high phosphorus content and huge annu⁃al production. The paper summarizes the current status of research on the recovery of phosphorus fromISSA based on wet-chemical technology, which mainly includes the phosphorus extraction process andthe subsequent production process of phosphorus products. The phosphorus extraction process mainlyinvolves acid extraction using acidic reagents, alkaline extraction based on alkaline reagents, and con⁃tinuous extraction with a combination of various methods. The phosphorus production process primarilyyields phosphorus products from phosphorus-rich solutions by means of chemical precipitation and crys⁃tal precipitation, generally yielding calcium phosphorus (Ca-P), struvite (MgNH4PO4·6H2O) andvivianite (Fe3(PO4) 2·8H2 O), all of which can be used as phosphorus fertilizers to promote plantgrowth. The difficulty of recovering phosphorus products from ISSA based on wet-chemical technologyis that sludge incineration ash is enriched with a large number of heavy metals and other impurity ele⁃ments, and it is necessary to reduce the content of impurities in the solution through various purificationpretreatment means, so as to improve the purity of the subsequently recovered phosphorus products. Inthis paper, various purification pretreatment means based on wet-chemical technology are reviewed,mainly including ion exchange impurity removal technology (CER), phosphorus adsorption-desorptiontechnology, and precipitation impurity removal technology through pH control. In conclusion, thispaper discusses the feasibility and necessity of recovering phosphorus products from ISSA, summarizingthe methods and technical routes of recovering phosphorus products from ISSA based on wet- chemicaltechnology, revealing the basic principles of recovering phosphorus products from ISSA using wet chemical technology, and providing technical references for developing new technologies for recoveringphosphorus from ISSA.