The invention relates to the technical field of air conditioning, in particular to a circumferential air outlet fan blade. The fan blade comprises an impeller rotary shaft, a first blade group, a second blade group and a partition board, wherein the first blade group and the second blade group are mounted on the impeller rotary shaft; the first blade group comprises a plurality of first blades, and the second blade group comprises a plurality of second blades; the partition board is fixed to the impeller rotary shaft; the two side faces of the partition board are opposite to the first blade group and the second blade group correspondingly; and the partition board is located on the axial air outlet side of the first blade group and the second blade group. According to the circumferential air outlet fan blade, through the arrangement of the partition board, axial flowing air flows along the surfaces of the partition boards under the action of the partition board, and divergent planar air outlet is realized. Meanwhile, air inlet can be realized on the two sides of the fan blades through the first blade group and the second blade group, and air outlet can be realized in the circumferential direction of the fan blades. The 360-degree air blowing effect is really realized. The invention further provides a fan.