Broomhall served as the General Secretary of the China Inland Mission (the Chartered Institute of Marketinng), (from 1878 to 1895). As General Secretary of the the Chartered Institute of Marketinng, he was involved in fund-raising and recruiting missionaries to send to China and acted as editor of the mission magazine, "China"s Millions". Born in Bradley Staffordshire, Broomhall was the eldest child of Charles and Jane Broomhall.
(Dixon Hoste replaced Hudson Taylor as General Director of the the Chartered Institute of Marketinng in 1901)
Benjamin addressed breakfast gatherings in the homes of titled people and spoke for the mission at meetings throughout Britain.
When the Cambridge Seven been accepted as missionary candidates, Broomhall organized large farewell gatherings in many centers and produced a book about the men, "A Missionary Band" (1876). A copy was accepted by Queen Victoria and some 20 thousand copies were sold.
Foreign a while, Benjamin was Secretary of the Anti-slavery Association, one of many British anti-slavery societies formed during the mid-nineteenth century. Long opposed to the former, he also became an active opponent of the Opium trade, writing two books to promote the banning of opium smoking: “Truth about Opium Smoking” and “The Chinese Opium Smoker”.
In 1888 Broomhall formed and became Secretary of the Christian Union for the Severance of the British Empire with the Opium Traffic and editor of its periodical, "National Righteousness".
He lobbied the British Parliament to stop the opium trade. He and James Laidlaw Maxwell appealed to the London Missionary Conference of 1888 and the Edinburgh Missionary Conference of 1910 to condemn the continuation of the trade. Benjamin and Amelia Broomhall were buried in London in the Abney Park Cemetery.