纯度是种子质量的重要指标，也是种子分级的重要依据。种子纯度的高低对于以杂交种优势实现增产目的的农作物而言，显得尤为重要。随着玉米假种子纠纷、案例的不断发生和曝光[5]，王米种子纯度检测的必要性愈来意引起人们的重视。本文将就五米种纯度欠佳的原因及各种检测方法的利弊进行评述，达到在现有条件下保障种子纯度，促进玉米生产之目的。 Purity is an important indicator of seed quality, but also an important basis for seed grading. The level of seed purity is particularly important for crops with the purpose of increasing production by the advantages of hybrids. With the corn fake seeds disputes, the continuous occurrence of cases and exposure [5], Wang Mi seed purity testing more and more the need for more and more attention. This article will be five meters of the reasons for poor purity and the advantages and disadvantages of various detection methods are reviewed to achieve the current conditions to protect the purity of the seed, and promote corn production purposes.