Calcium alginate hydrogel has been applied widely in tissue engineering because of its high water absorption

bio-compatibility and biodegradability. The most commonly used method is to prepare calcium alginate hydrogel by reaction of sodium alginate and calcium ions. However

the calcium ions are free diffusion in the solution

which cannot control the physiological structure of the gelation

and restrict the application of calcium alginate hydrogel. Therefore

how to produce calcium alginate hydrogels simply with specific physiological structure has become a hot spot of research in recent years. The preparation of Calcium alginate hydrogel based on electrodeposition method can control the timing and location of calcium ions precipitation

so that it is possible to get calcium alginate hydrogel with any structure. The principle of calcium alginate hydrogel prepared by electrodeposition is reviewed. The factors that influence the gelation of electrodeposition are discussed. The application and development of electrodeposition method are summarized and prospected.