Creep deformation detection device for observation window of manned bathyscaph and use method of creep deformation detection device

The invention relates to a manned bathyscaph observation window creep deformation detection device and a use method thereof, a laser emitting assembly and a laser receiving assembly are arranged on a window seat in the direction towards an observation window, reflecting surfaces are assembled, and laser emitted by the laser emitting assembly passes through the two reflecting surfaces and is finally received by the laser receiving assembly to form a laser light path; axial displacement measurement and monitoring early warning are carried out on the observation window according to the relative position or the relative distance between the laser path between the two reflecting surfaces and the center of the small end of the observation window, namely the on-off condition of the laser path. The detection device can reliably obtain the displacement condition of the center of the small end of the observation window relative to the window base through measurement and monitoring, is convenient to install and use inte