NCEPNCAR reanalyzed monthly average data of 1979~1999 monthly average OLR fields of 1971~1999 and daily maximum temperatures of 1960~2000 obtained from every meteorological station in Ningxia were applied to conduct acomparative diagnosis on major climate features of atmosphere irculation and OLR fields in typical years with more and less high temperature weather in July.Results show that the intensity and location of polar vortex，continent high pressure and subtropical high pressure are distinctively different in July with more and less high temperature weather，and the temperature field distributions are on contrary at middle and high latitude.And the high temperature weather is also related to variation of atmosphere at low latitude and tropical zone.