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Abstract.

In China ,The Plastic mulch type greenhouse cattle barn was one of the commen Cowshed,whitch offers some of the advantages of Low cost withSimple structure and and allows producers to have some control over the cow‘s environment during warm seasons of the year. But in China there are technical bottlenecks for environmental control problems in The Plastic mulch type greenhouse cattle barn in cold seasons of the year,such as humidityand Carbon dioxide concentration was too large. distribution of airflow indoor was Uneven. In order to study the Distribution of Environmental parameters in Plastic mulch type greenhouse cattle barn during winter to guide the improve and optimize the design the cattle barn, the computational fluid dynamics method was used, The theoretical value and the measured values were compared. According to field and laboratory values determined boundary conditions, such as fan, ventilation tube , Distribution of Environmental parameters in Plastic mulch type greenhouse cattle barn during winter were studied