【Background】Scales are a group of insects belonging to Hemiptera, Sternorrhyncha, Coccoidea. They are small and polyphagous pests, easily transferred with plant products. It is possible to use data from the China Inspection and Quarantine (CIQ) to determine entre points and rate of spread of high risk species. 【Method】In this paper, we analyzed the information of scales intercepted by CIQ from 2005 to 2014 including scale category, country of origin, product category, and entry date. We also analyzed the scales excluded from the quarantine list. 【Result】The results showed that 171978 batches of scales were inspected on imported plants and plant products during this period, including 7071 batches that were quarantined pests from 12 species. Planococcus lilacinus, Planococcus minor, and Dysmicoccus neobrevipes were the top 3 pests with 2848 batches, 2442 batches, and 1714 batches intercepted, respectively. Asian countries, especially Southeast Asia, were the main countries of origin and where the main three species came from. Fruits are the main carrier of scales, accounting for 99.0% of the total amount of scales. There was a gradual decrease from 2006 to 2010, followed by a huge increase in 2011. P. lilacinus was the main pest from 2005 to 2008, and then P. minor became dominant. D. neobrevipes became the most important pest in 2011. There were 68797 batches scale pests not included in the quarantine list of China since 2005, among them 68712 batches were identified as belonging to 105 species and 46 genera. There were 23 species unreported in mainland China with high risk to invade. 【Conclusion and significance】The analysis of the intercepted data from CIQ helped better understand pest dynamics and improve targeted quarantine and monitoring. At the same time, it can help the research institute to understand the needs of port application and cooperation, to prevent the invasion of exotic pests.