猪肉是中国消费者餐桌上的主要肉类消费品,其价格的变化影响到居民的生活水平;并且猪肉价格与CPI的变化有着密切的关系~([1])。中国近些年猪肉价格的波动幅度剧烈,猪肉价格陷入一种“短缺”与“过剩”交替互现的波动之中~([2])。因此,研究猪肉价格波动形成的机制是解决价格波动的重要出发点。由于猪肉价格的频繁波动,引起了广泛的关注。已有猪肉 Pork is a major consumer of meat products on Chinese consumers’ table, and its price changes affect the living standards of residents; and the price of pork is closely related to the change of CPI ([1]). In recent years, the price of pork has fluctuated violently in China. The price of pork has been plunged into the alternation between the “shortage” and the “surplus” (2). Therefore, studying the mechanism of pork price fluctuation is an important starting point to solve the price fluctuation. Due to frequent fluctuations in pork prices, has caused widespread concern. Already have pork