A quick connection clamping hoop, comprising an upper clamping hoop body and a lower clamping hoop body that are both in a semi-annular shape, two upper convex ribs being disposed on an inner annular face of the upper clamping hoop body at intervals, the two upper convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and an upper sealing ring groove located between the upper convex ribs being disposed on the inner annular face; and two lower convex ribs being disposed on an inner annular face of the lower clamping hoop body at intervals, the two lower convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and a lower sealing ring groove located between the lower convex ribs being disposed on the inner annular face; wherein the upper clamping hoop body and the lower clamping hoop body each have one end as a plug connecting end and the other end as a connecting end; connecting ends of the upper clamping hoop body and the lower clamping hoop body each are provided with a lug , and the connecting ends of the two are connected together via a bolt passing through lugs ; plug connecting ends of the upper clamping hoop body and the lower clamping hoop body are connected together via a plug connecting mechanism disposed at the plug connecting ends of the two; and after end-to-end connections, the upper clamping hoop body and the lower clamping hoop body are capable of enclosing central space for receiving a pipe, and a sealing ring installed in the upper and lower sealing ring grooves is disposed in the central space; characterized in that : a distance between a groove bottom of the upper sealing ring groove of the upper clamping hoop body and an inner annular face of an upper convex rib is an upper groove depth; the upper groove depth is the greatest at a middle part of the upper clamping hoop body and the smallest at an end part of the upper clamping hoop body ; a distance between a groove bottom of the lower sealing ring groove of the lower clamping hoop body and an inner annular face of a lower convex rib is a lower groove depth; and the lower groove depth is the greatest at a middle part of the lower clamping hoop body and the smallest at an end part of the lower clamping hoop body , wherein the upper groove depth gradually decreases from the middle part of the upper clamping hoop body to two end parts; and the lower groove depth gradually decreases from the middle part of the lower clamping hoop body to two end parts. a distance between a groove bottom of the upper sealing ring groove of the upper clamping hoop body and an inner annular face of an upper convex rib is an upper groove depth; the upper groove depth is the greatest at a middle part of the upper clamping hoop body and the smallest at an end part of the upper clamping hoop body ; a distance between a groove bottom of the lower sealing ring groove of the lower clamping hoop body and an inner annular face of a lower convex rib is a lower groove depth; and the lower groove depth is the greatest at a middle part of the lower clamping hoop body and the smallest at an end part of the lower clamping hoop body , wherein the upper groove depth gradually decreases from the middle part of the upper clamping hoop body to two end parts; and the lower groove depth gradually decreases from the middle part of the lower clamping hoop body to two end parts. <EOS>