A fuel cell bipolar flow field plate and a fuel cell stack are provided in which the bipolar flow field plate includes a first gas channel and a second gas channel. Each of the gas channels has several sub-channels, each of the sub-channels has bending parts, and the flow directions of adjacent sub-channels are opposite. The sub-channels of the two gas channels form a four-leaf clover type pattern in the reaction area of the bipolar flow field plate, wherein a bending angle of each of the bending parts in the four-leaf clover type pattern is within 90 degrees, so as to greatly reduce the flow field pressure and resistance of fuel cell, thereby improving the efficiency of the cell. |