Abstract: The results,observed and investigated in Pinus elliottii and P.taeda young stands of Minhou county, Liancheng county and Changle city, showed the pine shoot dieback disease lowered respectively 56.73% and 35.82% of the length and diameter growth of P.elliottii new shoots. The diseased shoot length and diameter growth were slowed up with the disease developing. The growth difference between the diseased and normal shoots became even more obvious after the disease peak of June.The disease incidence was negatively correlated with height and dbh of young trees.According to the damage from the diseaes measured through 25plots in 13～17 years old stands of P.elliottii in Nanyu forest farm．　The loss estimate models of height(y^),　dbh (y^),and volume (y^)have been established.The three models provide a scientitic basis for loss assessment and control decision of the disease.