从兵马俑坑中出土了数以万计的实战兵器，有刀、剑、矛、戈、戟、弓、弩、镞等，分为长兵器、短兵器、远射兵器和礼兵器4大类。这些兵器制作精良，在铸造工艺方面达到了相当高的水平。
兵器中最引人注目的是一把青铜剑。历经2 000多年，剑表面没有生锈，至今仍锋利无比，光亮如新。经鉴定，这把剑系铜锡合金，并含有10多种其他稀有金属。剑表面有一层10～15微米的含铬化合物氧化层，表明这把剑曾采用铬盐氧化技术处理。镀铬技术是在20世纪30年代由德国人发明的，而我国在2 000多年前就开始在兵器上镀铬，实在令人叹服。
Thousands of real weapons were unearthed from the pits，including broad knives，swords，spears，dagger－axes，halberds，arrows，crossbows，and arrowheads.The weapon can be classified into four categories：long－shafted weapons，short weapons，long－range weapons and weapons for guards of honor.They were delicately made and enjoyed a high level casting technology.
The most attractive among the weapons is a bronze sword，which still glitters in metallic luster without being rusted，though buried underground for over 2 000 years.Technical examination reveals that the sword is composed of an alloy of copper and tin and more than ten other rare metals.It is plated with a thin layer（10－15 microns）of oxidated chromium，which proves that the weapon was oxidated with chromium when it was made.The technology of chromium coating was invented by the German in 1930s，but in China chromium－coating technique was employed in the making of weapons over 2 000 years ago.It is really a wonder and compels admiration.
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