Abstract: In this paper, the pressure correction of the cosmic ray intensity in Yangbajing is investigated. Pressure correction is not only related to the atmospheric pressure, but also to the solar activities. The absolute value of barometric coefficient is biggest when the level of solar activities is highest. And the barometric coefficient is related to the sampling time of data. In the same time, using different sampling time got different barometric coefficient. The pressure correction is made to the raw data of Tibet neutron monitor, and the barometric coefficients of single channel and eight multiplicity channels are calculated.