The Malayan porcupine is the earliest species named in the genus Porcupine. Previously, there were as many as 11 subspecies or synonyms, and the Chinese porcupine (<Hystrix hodgsoni>) was also once a subspecies. The so-called "Chinese porcupine" is actually originated from Nepal. Yunnan once named a porcupine species, which was once a subspecies of the Malayan porcupine and is currently a subspecies of the Chinese porcupine. Therefore, there is still some controversy in the classification of porcupines, which needs further study. Pan Qinghua et al. (2007) recorded that in the Yingjiang area in western Yunnan, the Chinese porcupine and the Malayan porcupine were distributed in the same area. It was also pointed out that the nasal bone of the Malayan porcupine is relatively short, less than half the length of the skull, while the nasal bone of the Chinese porcupine is more than half the length of the skull. Therefore, Pan Qinghua et al. (2007) believed that the Chinese porcupine and the Malayan porcupine are both independent species.
Malayan porcupines are active mainly at night. They usually live in family units and live in burrows or rock crevices during the day. When encountering predators such as tigers, leopards and Asian jackals, they will quickly erect the spines on their necks and backs and slap the ground with their hind legs to scare off the enemy. If further threatened, they will rush sideways or backwards towards the enemy and attack with their spines. It eats fruits, bark, roots, leaves and fleshy plants, but also eats animal bones to sharpen its teeth and supplement calcium and phosphorus from hard thorns.