The invention discloses a ship inclination test device which comprises a water tank, a suspension rod, a pendulum bob, a rope and a plurality of wave absorbers, the water tank is used for containing water, the suspension rod is fixed on the outer wall of the water tank, the pendulum bob is suspended on the suspension rod through the rope and immersed in the water in the water tank, each wave absorber comprises a plurality of blades, and the wave absorbers are arranged on the inner wall of the water tank. At least part of the blades are immersed in water. According to the ship inclination test device, water is adopted to replace heavy oil to immerse the pendulum bob, the difficulty of inclination test preparation work is reduced while pollution is avoided, due to the fact that the viscosity of water is low, water in the water tank is prone to oscillation in the inclination test process, the pendulum bob cannot be stabilized within a long time. According to the ship inclination test device, the wave absorbers are arranged on the inner wall of the water tank, and the blades of the wave absorbers can interact with water to inhibit water oscillation, so that the pendulum bob can be stabilized in a short time, and the efficiency of an inclination test is further improved.