Based on the measurement of CO2, N2O and CH4 emissions from corn farmland by the static-chamber/gas chromatography technique, this paper studied the effects of two kinds of fertilization modes including traditional fertilization and controlling fertilization on greenhouse gas emissions in rain-fed dry land. The results showed that the seasonal characteristics and total amount of emissions of CO2 and CH4 were not significantly different under various fertilization modes, whereas those of N2O were significantly different between two kinds of fertilization modes. Compared to traditional fertilization, N2O emission from cropland under controlling fertilization decreased by 70.40%, indicating that base fertilizer application was an important factor affecting N2O emission. Integrated evaluation of greenhouse effect showed that, the global warming potential (GWP) and greenhouse gas intensity (GHGI) of controlling fertilization were significantly lower than those of traditional fertilization, which decreased by 73.08% and 74.00%, respectively. The study further suggested that amendment of N︰P ration (controlling fertilization) is an effective approach to reduce greenhouse gases in rain-fed dry land.