The effects of reaction temperature from 313 K to 353 K on the direct electro-deoxidation of solid PbO to porous lead in choline chloride-ethylene glycol deep eutectic solvent (ChCl-EG DES) are elucidated preliminarily at cell voltage 2.5 V for 4 h. Cyclic voltammetry of PbO powders on microelectrode in ChCl-EG indicates that a promotion effect of the increase in temperature is noticed on cathodic current. Constant voltage electrolysis demonstrates that the reduction degree of PbO pellet is 88.19% (in weight) at 353 K and appropriate raising of temperature can significantly facilitate the metallization of solid PbO to lead. Additionally, the morphological and crystallographic characteristics of porous lead are also clarified. Different shapes of dendrites and hexagonal crystal plates are generated at higher temperature with the predominant (111) plane of lead due to its slow growing rate. Furthermore, the direct electrolysis models of PbO pellet at lower and higher temperatures in ChCl-EG are put forward. The raising of temperature plays a crucial role in improving the reduction rate of the direct deoxidation of PbO(s) -> Pb(s) and dissolution-electrodeposition of [PbO center dot Cl center dot EG](-) -> Pb(s). (C) 2017 The Electrochemical Society. All rights reserved.