In order to explore the western Jilin land consolidation project's contribution to regional-wide warming, based on the measured data of paddy soil greenhouse gases, the analysis of regional greenhouse gas emissions, a scientific basis for assessing the impact of paddy development on global warming had been provided. With the method of combining field sampling and region experiments, taking saline-alkali paddy field of Jilin province as an investigation object, of 0~30 cm surface soil samples of paddy were collected back to the experiments field. Pits with the size of 100 cm * 100 cm * 50 cm were digged in the field, after laying plastic sheeting at the bottom of the pits, the soil taking back from the sampling points were filled into the pits, watering, planting rice. Six plots were filled with different developed age soil, their disposal model was the same as QianGuo's local water and fertilizer management, drainage.was digged around the plots To research the greenhouse gas emission and contribution in the paddy, estimate GWP in the area, CH_4, CO_2 and N_2O that released by soil during rice growth period were monitored by Static box - gas chromatography. combine The greenhouse gas GWP contribution was analysised combined with thirty years paddy area change. The results show that different development age total value greenhouse gas emissions (CO_2-eqv) during paddy growing appeared an increasing trend, in the development process paddy CO_2, CH_4 and N_2O emissions of greenhouse gases contribution rate for each period has a certain change, CO_2 emissions contribution rate is dominant about 80%, CH_4 contribution rate 16.69%~20.39%, is N_2O 14 to 22 times, indicating CH_4 emissions have a great comprehensive contribution on study area .In early paddy, N_2O has higher contribution rate compared to mature paddy. In the rice growing vigorous period, CO_2 contribution rate was decreased obviously, CH_4 contribution rate was increased significantly, N_2O contribution rate changed little. CH_4 and N_2O contribution rate is small in mature stage and returning green stage, which, apart from maturity stage the newly developed paddy CH_4 contribution rate, CO_2 contribution rate has dropped and fell significantly, the proportion of the contribution to greenhouse gas CH_4 increase, much higher than N_2O in this period. In mature stage three greenhouse gas contribution rate compared with other periods changed greatly, CH_4 than N_2O has a slight advantage, CO_2 makes a recovery percentage to 95%. This is mainly with changes in soil conditions, In the rice growing vigorous period, waterlogged layer provides a good soil microbial anaerobic conditions, makes CH_4 contribution rate increase.In mature stage shallow water layer and draining off, the dry conditions are not conducive to CH_4 emissions, N_2O is basically trace gas compared to the CO_2 which produced by mature plant respiration more than photosynthesis. The total GWP in the study area continue to increase, and the growth rate was the same with the area of paddy field increased trend. The newly developed paddy contributed significantly to the greenhouse effect, which with the development of rice farming in nearly 20 years in the study area has a direct relationship. It shows that large-scale development in the western area of Jilin saline paddy has made some contribution to regional warming.