This paper mainly studied the influence on the carbon emission permits and trading on the production strategy
for manufacturing enterprises. The enterprises might obtain carbon emission permits in three different ways, i.e.
government quota, market trading and purification treatment. The enterprises must make a tradeoff between them. The
characteristic of purifying cost was analyzed. Then, an optimal production model with carbon emission permits and
trading was established. Finally, a typical numerical experiment was employed to show the influence of the parameters on
optimal production decisions.