Stern shaft disassembly tool and stern shaft disassembly method

The invention relates to a stern shaft disassembly tool and a stern shaft disassembly method. The stern shaft disassembly tool comprises a pull rod, a protective sleeve and two lifting snap rings; thepull rod comprises a pull rod body and lifting lugs fixedly arranged at both ends of the pull rod body; the pull rod body is detachably fixedly arranged in a stern shaft flange hole of a stern shaftto be disassembled in a penetrating mode, the lifting snap rings are fixed to both ends of the pull rod body in a hinged mode, through applying acting force to the lifting snap rings, the acting forceis applied to the stern shaft, the stern shaft is pulled out of a stern shaft bearing, due to the fact that the stern shaft disassembly tool is good in fixation stability, the possibility of the problem of loosening caused by using a cloth strap for colligation and existence of potential safety hazards can be avoided, and at the same time, the problem of damage to the stern shaft surface, so as to affect the use of the ste