The invention discloses a PEM hydrolysis hydrogen production titanium metal bipolar plate and a preparation method thereof, and the bipolar plate is prepared by weighing nickel powder, cobalt powder, pure titanium powder, metal tantalum-niobium powder I and metal tantalum-niobium powder II according to a certain mass ratio, and performing compaction, sintering and hot rolling on the nickel powder, the cobalt powder, the pure titanium powder, the metal tantalum-niobium powder I and the metal tantalum-niobium powder II. The bipolar plate disclosed by the invention has the comprehensive properties of oxidation resistance, high corrosion resistance, high surface conductivity, high corrosion resistance, high strength, easiness in stamping deformation, low cost and the like. The contact resistance of the bipolar plate is lower than 5 m omega/cm < 2 >, the corrosion current density in an anode environment is lower than 9 * 10 <-8 > A/cm < 2 >, the room-temperature tensile elongation is larger than 15%, the thickness of an oxide layer is lower than 1 micron after the bipolar plate operates for 24 h under the cell voltage of 1.6-1.8 v, and the area fraction is smaller than 3%.