Side opening door for pressurization cabin

The invention relates to the technical field of pressurized cabins, in particular to a side opening door for a pressurized cabin, which comprises a cabin body, a cabin door slidably connected in the cabin body, a pneumatic lock assembly mounted in the cabin door, a frame fixedly connected with the cabin body, a lock cavity formed in the front side of the frame, and an ejection assembly and a limiting assembly mounted on the upper side and the lower side of the frame respectively. Clamping grooves matched with the limiting assemblies are formed in the cabin door on the upper side and the lower side of the pneumatic lock assembly, and an observation plate is fixedly connected to the surface of the cabin door; according to the device, the pneumatic lock assembly is installed in the cabin door, when the cabin door is closed, the pneumatic lock assembly slides into the frame, the pneumatic lock assembly is matched with the lock cavity, automatic locking and opening are achieved through the pressure difference betw