16 German Shepherd breeding male dogs were randomly choosen in a dog farm of southern China todo statistical analysis on semen collection volume and sperm quality of the semen collected in 2011.The effect of local main climatic factors on sperm quality of dogs was analyzed. The results showed that the sperm quality of dogs was defferent along with the defferent months and seasons. The high temperature in summmer had a high and nagative effect on the sperm quality. Sperm motility, sperm density and sperm malformation rate had a moderate correlation with temperature(P>0.1). Ejaculatory amount no correlation with temperature(P>0.1). Thus, ejaculatory amount had moderate correlations with rainfall(P<0.1) and had no correlation with other traits.