The utility model discloses a pH/ORP (oxidation-reduction potential) electrode protection device which comprises a hollow box body capable of holding an electrode, wherein the box body is a rectangular body comprising a top panel, a bottom panel and three side panels, one side surface of the box body is open, a through hole is formed in the top panel, through holes are formed in the three side panels, and the space between the bottom edges of the through holes in the side panels and the bottom panel is greater than the height of the electrode. The device disclosed by the utility model is simple in structure and not easily blocked, and can prevent the pH/ORP electrode from being impacted and damaged by external force or relatively large sundries.