A surgical staple line reinforcement device for use with a variety of surgical staplers having a pivoted connection between stapler arms or jaws, such as endoscopic stapler devices. The device comprises a pair of tubes of bio-implantable material connected together at a hinge. The device can be quickly and easily applied to a surgical stapler by a surgical team to provide tissue reinforcement. The hinged connection of the device provides both for secure attachment of the device to the surgical stapler, and for a barrier to protect the pivot connection from contamination by migrating tissue during operation. Preferably, tear lines are provided on each of the tubes to assist in removing excess material following attachment of staples. The device allows for fast and safe staple reinforcement and rapid stapler separation and removal following installation.