On August 7, 1930, he married Queen Khamphoui and they had seven children, Crown Prince Vong Savang, Prince Sisavang, Prince Savang, Prince Sauryavong Savang, Princess Savivanh Savang, and Princess Thala Savang.
In 1951, he served as Prime Minister, and when his father became ill on August 20, 1959, he was assigned Regent.
On October 29, 1959, he acsended the throne upon the death of his father. He abdicated in December 2, 1975, after the communist revolution and died in an internment camp in northern Laos along with Queen Khamphoui and Crown Prince Vong Savang who also died under similar circumstances.
In addition to her Beauty, the dominant impression of the presence the Majesty Queen Khamphoui was her great softness, her alleviating or comforting words, the flexibility of her gestures and the harmony of her steps.
One murmured that the Crown prince SriSavangVatthana was strongly struck by it at the time of about fifteen Princesses, most beautiful of the Kingdom, were introduced to him, during his holiday visits.
The rigour which it itself was essential, in conjunction with Western education that he had received, had made him achieve a highly significant gesture in the abandonment of a thousand-year-old, at the same time dynastic tradition and polygamy.