关税配额是限制进口的一种措施 ,它不直接对进口商品的数量或金额进行限制 ,而是在一定的时期内对一定量的进口商品实行较低的关税或免税优待 ,但对超量进口的商品则征收高额关税 ,甚至进行罚款。关税配额最早是作为防御性的贸易保护措施而被采用的 ,随着市场资产的不断加剧 , Tariff quotas are a measure to limit imports. Instead of directly restricting the quantity or amount of imported goods, tariff quotas apply to a certain amount of imported goods for a certain period of time with lower tariffs or exemptions, but for excessive imports. The goods are subject to high tariffs and even fines. Tariff quotas were first adopted as defensive trade protection measures, and with the intensification of market assets,