Abstract: Temporal variations of air temperature and precipitation in the past 55 years were analyzed for Leishan County by using statistical methods and observational data of Leishan National Weather Station from 1961 to 2015. The results showed that rainy days at Leishan County in the last half century mainly occurred in June, with average rainfall and rainy days in June being 250.5 mm and 18.9 days, respectively. While the average annual rainfall increased at a rate of 0.37 mm per 10 years, the annual rainy day decreased at a rate of 3.07 day per 10 years. The main reason was the increase in the rainfall intensity and frequency in summer followed by winter. Annual average temperature increased at a rate of 0.08 degrees per 10 year with more obvious increase in the recent 10 years when there was an obvious increasing trend of amplitude between trough and crest. Air temperature increased in each season to different degrees, with winter (0.12℃/10 years) followed autumn (0.11℃/10 years) being the season with the greatest increase. The increase in annual precipitation and annual average air temperature resulted in a potential increase of Karst landform solubility and erosion.