The utility model discloses a tent with an annular stiffening support, which comprises two diagonal rods, an annular support rod and tent cloth, wherein a plurality of vertical connecting sleeves are connected onto an external wall of the tent cloth; the diagonal rods are sleeved with the connecting sleeves; the middles of the two diagonal rods bent into arcs are intersected and bound; the end parts of the diagonal rods are inserted into ground for fixing; loop belts with transverse openings are arranged on the connecting sleeves; and one end of the annular support rod sequentially penetrates through the loop belts on the connecting sleeves and is closed together with the other end to form an annular shape. The tent can solve the technical defect that the tent cannot bear a circumferential distortion force caused by wind direction change in the prior art; with the adoption of the annular stiffening support, the tent is stable in structure and particularly suitable for field camping; and the resistance to external wind and rain loads distributed uniformly can be improved.