Live hog price fluctuations will seriously affect the healthy development of the pig industry. This paper use seasonal and wavelet analysis methods to analyze the seasonal, cyclical and trend characteristics of swine price fluctuations. Our results show that the hog price is in a rise trend, but during the ascent has significant cyclical and seasonal characteristics , and the time length of each cycle is getting shorter, indicating more and more frequent fluctuations in hog prices. In view of this situation, we propose reasonable policy recommendations to stabilize the price of live pigs.