1938年中日戰爭期間總鋪畀人劫掠，香港分鋪隨後喺日軍轟炸中被破壞。光復後到1949年仍未恢復元氣。後由第三代店主黃金海補充資金，擴大經營品種，先至扭虧為盈。1956年全行業公私合營，三多軒失去咗原文房經營特色，黃家後人盡數退出。1958年，因高第路交通不便，舖頭遷去北京路。文革期間，曾被逼先後改名新文化、文鋒，1979年，復名三多軒文房用品商店。
During the Sino-Japanese War in 1938, the main shop was looted, and the Hong Kong branch was subsequently destroyed by the Japanese bombing. After the liberation, it did not recover until 1949. Later, the third-generation shopkeeper Huang Jinhai replenished funds and expanded the business varieties to turn losses into profits. In 1956, the whole industry was a public-private partnership, and Sanduoxuan lost the characteristics of the original property management, and all the descendants of the Huang family withdrew. In 1958, due to the inconvenience of Gaodi Road, the store was moved to Beijing Road. During the Cultural Revolution, he was forced to change his name to New Culture and Wenfeng, and in 1979, it was renamed Sanduoxuan Stationery Store.