Sung Siew Secondary School is a part of the Basel Christian Church of Malaysia.

The development of Basel Church schools was inspired by foreign settlers to provide education to their children.

Yap Hyen Moo, who was commissioned by the Basel Mission's Church at West Point in Hong Kong who was to be stationed in Sandakan as the first catechist school teacher.

Since then, the school became known as ‘Sung Siew’ which means ‘Double Education (English and Chinese Language).’ Among a number of efficient and dedicated teachers at that time was the late Mr. Chung Yuk Fong (who was at one time the President of the Basel Christian Church of Malaysia in Sabah), who was well known for his dedication as a long-serving teacher in that.

During the ensuing three years after the first World War which ended in 1918, the school had financial and personnel difficulties and therefore the English section was not reopened until 1923.

At the end of 1941, the Japanese army arrived and occupied North Borneo and Sung Siew was compelled to close for the second time.

The only church property that was not destroyed during the World War II was an old rectory built by the Basel mission.

In 1949 a double-storey wooden building costing about RM 16,000.00 was built with the aid of an outright donation of US$ 2,000.00 from the then Director of the Lutheran World Federation in Hong Kong, the late pastor Arthur S. Olson, and a single generous donation of RM2,000.00 from a member of the church, the late Mr. Wong Tet Siew.

Previous school website projects including the one in 2004 (searched by the Wayback Machine) did not stand for long as generations of students are graduated each year.