Abstract: Production cost functions for unbleached masson pine kraft pulp (UBMKP) under different management models were used to determine the economic weights and value to breeding of standing volume,specific gravity and pulp yield and establish corresponding breeding objectives and index selection equations.It was found that importance of breeding objectives was related to cost structures of pulp production.For the pulp mill from growing trees to the production of UBMKP increasing pulp yield and specific gravity had major effects on reducing production cost,since pulp yield and specific gravity primarily influenced the future costs (harvesting,transport,and pulping).Increasing the discount rate should result in decreasing of importance of pulp yield and specific gravity.For a pure forest production system with no affiliation to pulp mill,the breeder’s attention should be focused on genetic improvement of standing volume,not on specific gravity and pulp yield.Sensitivity analysis indicated that economic weights including component costs,rotation and discount rate had minimal effects on the selection decisions.Economic consequences for breeding of pulp production showed that the first-generation improved plantation could be expected to achieve additive annual profit of RMB Yuan 6.6～7.5 million for a pulp company with a mill capacity of 200000 t and self-sufficiency in wood supply.assuming that the ten top trees in every 100 was selected.