Abstract: When high speed train travels in tunnel or two trains encounter, there takes place a big wave in the train′s carriage, which makes passengers feel uncomfortable. In order to solve this problem, the pressure control technology which borrows ideas from airliner cabin′s pressure control technology is promoted. The pressure control technology consists of pressure regulators. After the pressure control technology is simulated by computer and tested, the result demonstrates that the technology is fit to the design requirements of high speed train, and in the meantime, the technology has low weight, flexible control, little pressure loss, good maintenance and reliability. It is indicated that the pressure technology is feasible.

Key words: high speed tr ains, pr essur e regulators, control methods, exper imental analysis