Jon Kum-song opened the scoring at the Kim Il-sung Stadium with a 20thminute penalty before Choe Ju-song found the net in the 37th and 67th minutes to take his individual tally to six in two games following his four- goal haul in the North Koreans' 11-2 win over Timor Leste in their opening fixture on Thursday.
In Saturday's other match, China also made it two out of two as Wang Zheng's side followed up Thursday's 3-1 victory over Malaysia with an identical winning margin over Singapore.
Midfielder Wang Jianxian broke the deadlock for the second successive match when he put China 1-0 up in the 13th minute having also netted the opening goal against the Malaysians.
Singapore equalised four minutes later when Bangladesh referee Abdul Hannan Miron awarded the ASEAN side a penalty which was successfully converted by skipper Adam bin Swandi but the two-time AFC U-16 Championship winners took control in the second-half, regaining the lead in the 69th minute through Li Xiaoming before China captain Zhang Xiuwei sealed the triumph three minutes into stoppage-time.
The qualifying campaign sees forty teams divided into two zones and separated into seven groups of six or five teams each. Each group will play one round-robin league at a centralised venue and the top two teams from each group will make it to the tournament proper.
The third best teams from the West and East zones will complete the 16-team line-up of the 2012 finals.