Installation joint and method of wellhead test tree for deep-water semi-submersible type platform exploration and test operation

The invention discloses an installation joint of a wellhead test tree for deep-water semi-submersible type platform exploration and test operation and an installation method thereof. The installationmethod comprises the following steps that a first connection part of the installation joint is connected to the lower end of the test tree through a test tree connection buckle, and a second connection part is connected to the upper end of an oil pipe through an oil pipe connection buckle; the well-killing wing valve end and the flow wing valve end of the test tree are connected with high-pressurehoses and lifted to the installation height by top drive; the lower end of the first connecting part is inserted into the second connecting part to enable a torque transmission rod to be clamped to atorque transmission groove, and a gland is fixed with a positioning pin; a sealing cover on a pressure test hole is opened, a pressure test device is connected, and the tightness of the installationjoint is tested; and after t