Pressure altitude simulator

The invention relates to a pressure altitude simulator and belongs to the technical field of structure design of pressure altitude simulators. A static port, a total port and plug-in holes are formed in the outer end of a simulator body. A pump assembly, a liquid crystal display module, a sensor assembly, a power source assembly, a volume assembly and a deflation valve assembly are arranged inside the simulator body. A fixing plate is further arranged inside the simulator body, and a several-piece assembly and a valve assembly are arranged on the fixing plate. Under the condition that the function and performance of equipment are not damaged, the functions of all units inside the pressure altitude simulator and the structure of the pressure altitude simulator are reasonably adjusted, so that the equipment is reduced to 4U at present from original 8U, and the miniaturization design of the pressure altitude simulator is achieved; meanwhile, due to the fact that functional modules of the simulator are integrated and the structure is simpler after adjustment, production and maintenance cost is correspondingly reduced, and the demands of users for miniaturization and low cost of test equipment are met.