Ultra-low earth orbit atmospheric environment simulation system and method

The invention belongs to the field of ultralow earth orbit atmospheric environment simulation, and particularly relates to an ultralow earth orbit atmospheric environment simulation system and method. A gas input structure continuously inputs working gas with a set volume flow rate into a discharge cavity; the gas density in the discharge cavity is the same as the atmospheric density of the ultra-low orbit, the radio frequency power supply drives the planar radio frequency coil to carry out inductive discharge, the working gas is ionized in the discharge cavity, high-density inductive coupling plasma is excited, and the direct current power supply electrifies the direct current magnetic coil and forms electromagnetic force; the electromagnetic force acts on the high-density inductively coupled plasma and accelerates the high-density inductively coupled plasma to a set speed to form spiral wave plasma to simulate rarefied molecular flow of an ultra-low earth orbit environment. According to the invention, high-