是按照联盟收入百分比的吧？

How is the salary cap set each year?

Each July the league projects Basketball Related Income (BRI) and benefits for the upcoming season.  They take a defined percentage of projected BRI (see the chart below), subtract projected benefits (about $112 million in 2005-06), and make adjustments based on whether the previous season's BRI was above or below projections.  They then divide by the number of NBA teams (except expansion teams in their first two seasons) to arrive at the cap.  The salary cap adjusts each year on the first day following the July Moratorium (see question number 89).

Note that adjusting based on whether the previous season's BRI was above or below projections creates a pattern where the salary cap increases significantly one year, and barely moves (or even decreases) the next.  This effect was more pronounced in the previous CBA, where lump-sum payments for such things as local media contracts counted fully in the year in which they were received.  The current CBA addressed this problem by mandating that lump-sum payments will be applied evenly across all of the salary cap years covered by a contract.  However, adjustments from the previous CBA (such as a $74 million increase in BRI in 04-05 attributable to the Lakers' local cable revenue) created a rebound effect that will last well into the current CBA.

Season	Defined percentage of BRI	Actual salary cap
2005-06	49.5%*	$49.5 million ($37.125 million for the Charlotte Bobcats)
2006-07	51%	$53.135 million
2007-08	51%
2008-09	51%
2009-10	51%
2010-11	51%
2011-12	51%

* The league and Players Association agreed to use a figure of $49.5 million for the 2005-06 cap, rather than the calculated figure (which would have resulted in a salary cap of $50.9 million).

At the other end of the spectrum there is a minimum team salary, which is defined as 75% of the salary cap.  Any team that doesn't spend at least that much is surcharged at the end of the season, and that money is given to the players.  In practice, most teams' salaries will be higher than the salary cap amount.

引用:

原帖由 ly781223 于 2007-5-16 11:01 发表
联盟吗？
我一直以为是球队呢

NBA的一个制度优点就是很多事情都由联盟决定，很大程度上避免了一家独大的豪门出现。