Device and method for measuring height of rubber damper in narrow area of ship

The invention provides a device and a method for measuring the height of a rubber damper in a narrow area of a ship. The device comprises a height measuring device before installation of the rubber shock absorber and a height measuring device after installation of the rubber shock absorber. The height measuring device before installation of the rubber shock absorber is mainly composed of a base, a graduated scale, a digital display screen, a scale frame, a micro-motion device, a bolt I, a bolt II, a measuring claw, a telescopic arm, a bolt III and a fine tuning knob; the height measuring device after the installation of the rubber shock absorber is mainly composed of an upper measuring plate, a lower measuring plate, a bolt IV, a digital display, a caliper and a bolt V. The actual deformation value D of the shock absorber needs to be determined in combination with the height H0 of the shock absorber, the thickness t of an adjusting gasket, the vertical height value H between equipment legs and a base panel an