The Sunda pangolin (Manis pentadactyla) is listed in the IUCN Red List of Threatened Species as a critically endangered species, and listed in CITES Appendices I. It is the most common illegal-trade mammal. Eighty seven live-smuggles Malayan pangolins were confiscated in China, in June, 2011. We estimated their age by their claws, scales, hair, body weight, and the relationships between mother and baby. They were divided into 4 age groups; cub (3 individuals), sub-adult (22), adult (32), and senior (27), representing 3.45%, 25.29%, 36.78% and 34.48% of the total group size, respectively. The age structure diagram was an inverse pyramid, with sex ratio 1:1.42 (male:female=36:51). The proportion of females was less than that of males, and the female proportion was the lowest in adult group (28.13%). Of the females, 7 were pregnant, a pregnancy rate of 36.10%. Among the pregnant females, one was a sub-adult whose weight was 1.95 kg. The highest fecundity (77.78%) occurred in the adult group. Morphological features of new born cubs were measured; body weight 143.3 ± 6.67 g (range 120-170 g, n=6); body length 14.7 ± 0.29 cm (range 14.8-15.4 cm, n=6); tail length 10.1±0.24 cm (range 9.5-11.2 cm, n=6). Our research indicated that the Malayan pangolin population has been largely destroyed, with severely unhealthy status in Southeast Asia. The population will continue to have a rapid decline if no effective protective measures are taken soon.