The utility model provides a tensile test device of a fixture for dragging a flexible oil pipeline. The tensile test device comprises a framework, a pull rod unit and a lifting jack, wherein one end of the framework serves as a fixture fixing end, and the other end of the framework serves as a fixture stretching end; the pull rod unit is arranged on the outer side of the framework stretching end, and the lifting jack is arranged between the framework stretching end and the pull rod unit; the tensile test device can be used for testing whether the lifting power of the fixture is enough or not under a condition of dragging the flexible oil pipeline after a long time use, and further obtaining the data of the maximum lifting power of the fixture and requirements to the tightening degree of the fixture, thereby providing scientific basis and security to safety construction of the fixture on the sea.