▎ 摘　　要

NOVELTY - Conductive pre-coating layer comprises first metal particle layer (2) distributed on surface of titanium substrate (1), in-situ oxidation layer (3) covering surface of first metal particle layer, second metal layer (4) covering surface of in-situ oxidation layer and nano conductive layer (5) covering surface of second metal layer from surface of titanium substrate outwards. At least one mixed layer of first metal particles and second metal particles is distributed from first metal particle layer outward to second metal particle layer in inner side in-situ oxidation layer. The metal of first metal particle layer is anti-pitting metal niobium, tantalum, molybdenum, tungsten and/or palladium. The in-situ oxidation layer is oxygen-deficient titanium oxide (TiOx) that metal titanium oxidation generates. The metal in second metal layer is high toughness metal gold, silver, platinum, tin and/or copper. The nano conductive layer is conductive noble metal or conductive carbon material. USE - The layer is useful for fuel cell titanium plate used in proton exchange film fuel cell (PEMFC) system and fuel cell stack. ADVANTAGE - The layer: improves the surface conductivity of the titanium substrate; has excellent bonding performance with titanium substrate; inhibits the oxidation of the titanium substrate; improves the durability of the coating; avoids the coating cracking phenomenon in the punching process; enables second metal particle layer surface of in-situ oxide layer to have excellent flow performance even if the cracking occurs; and quickly fills protection to crack. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the conductive pre-coating layer. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a cross-sectional structure of the conductive pre-coating layer for fuel cell titanium plate. 1Titanium substrate 2First metal particle layer 3Compact in-situ oxidation layer 4Second metal layer 5Nano conductive layer 201First metal particles 401Second metal particles