Ce-doped LaCrO₃ samples were synthesized by mild hydrothermal method. The samples show good crystallinity. Sample morphology can be affected by the concentration of mineralizer (KOH). With the same starting chemicals ratio of La:Ce:Cr, hollow, rectangle, smooth, roughed and porous cubics could be resulted when 3, 4, 5, 6 and 7 g KOH was added in the reactive mixture. According to XPS results, Ce is mainly +4, and minor Cr²⁺ occurred in the samples. This research is important to the synthesis and application of Ce-doped LaCrO₃ materials.