The invention relates to the technical field of marine environment simulation test equipment, in particular to a vertical simulation device. The vertical simulation device comprises a body water tank; a supporting frame is arranged at the bottom in the body water tank and provided with an oil dirt ejector; an oil dispersant ejector is arranged above the right side of the supporting frame; a laser particle instrument is arranged on the middle side wall of the body water tank above the oil dispersant ejector. A liftable high-speed camera system is arranged on the right side of the exterior of the body water tank. The oil dirt ejector, the oil dispersant ejector, the laser partition instrument and the liftable high-speed camera system are all connected with a controller. A water inlet pipe is arranged at the bottom of the left side wall of the body water tank, and a water drainage pipe is arranged at the bottom of the body water tank. The vertical simulation device is reasonable in structure, scientific in design, capable of simulating the vertical migration diffusion process rule of seabed spilled oil and other pollutants in water under different ejecting speeds and the submersible oil dirt existing mechanism and conditions.