A method of filling inner cavity of radome body with high-pressure gas is provided in this paper, which is used to examine the static strength and destroy strength of test piece. The testing process is accomplished due to the control of computer. The test piece is mechanically positioned. Two rubber tyres are respectively arranged on inner and outer side of a larger end of the radome body, while high-pressure oil is filled into the rubber tyres. The radome body is clamped and supported by hydraulic power. Then fill the inner cavity of radome body with high-pressure gas. By observing if the body is to be broken, the static strength and destroy strength thereof is examined.