Preparation method of fuel cell metal polar plate and metal polar plate multi-step forming production line

The invention discloses a preparation method of a fuel cell metal polar plate and a multi-step forming production line of the fuel cell metal polar plate, and the preparation method of the fuel cell metal polar plate comprises the following steps: a feeding process: feeding a metal base material to first-order stamping equipment with a first-order forming die; the thickness of the metal base material is less than 0.2 mm; a first forming process: performing first stamping pre-forming on the metal base material by using first stamping equipment to form a pre-formed metal pole plate; a transfer and electric treatment process: controlling transfer electric treatment equipment to move the preformed metal pole plate to an electric treatment station on the transfer electric treatment equipment for electric treatment, and taking out the metal pole plate after the electric treatment is finished; the electric treatment clamping area is gt; 500 mm < 2 >; a second-order forming process, wherein second-order stamping equi