Abstract: The Paper investigates chemical bath deposition and electrochemical deposition of CdS thin-film for solar cells,and the influence factors on film growing.Result shows that chemical bath deposited CdS thin-film has favorable quality,but depositing rate is low,influence of pH on depositing rate is strong,and there is deposition of CdS film on the bath container.Electrochemical deposition of CdS film is prepared with current density of 0.5～2.5mA/cm²,depositing rate is high,and material lost low.The influence of current density is great,parameters of film-growing are difficult to Control.