Arthur joined the Baptist Missionary Society and went to China in 1887, firstly to Shantung. In 1897 he journeyed to India with one of China's most influential Baptist missionaries, Timothy Richard. Richard hoped to see the conditions of mission work in India and was pleased to have the "able and earnest" young missionary as a traveling companion. They visited Sri Lanka, Madras, Agra, Varanasi, Delhi, Mumbai and Kolkata, where Arthur "had a sharp attack of cholera, narrowly escaping with his life."
In 1892 Arthur Shorrock and Moir Duncan founded the Sianfu Mission, in present-day Xi'an, Shaanxi Province. Arthur was responsible for the Baptist mission work in Shaanxi and became the Principal of the Shaanxi Bible College. In 1898 Moir Duncan and his wife returned to England on a furlough. Maud Doulton, who was attending the Royal Holloway College before graduating in 1890, was then engaged to Arthur. She left England in January 1900 accompanied by the Duncans. Arthur and Maud were married soon after arriving in Shanghai and they and the Duncans arrived back in Xi'an on 24 May 1900. Seven weeks later, on 6 July they were forced to leave the city secretly to escape the Taiyuan Massacre during the Boxer Rebellion. Two years later they returned and Maud then took responsibility for 'Women's Work', and in 1914 became principal of the church's Girls' High School in Xi'an. Up until shortly before Arthur Shorrock left China, the following missionaries had worked with him: Together with the Chinese members they established the following:
Once the Xinhai Revolution reached Shaanxi, resulting in the death of eight foreigners, an evacuation of all missionaries and other foreigners in the region was planned. The RevJ C Keyte and the explorer Arthur de Carle Sowerby planned the relief expedition, and all but a handful of the mission was successfully evacuated due to their efforts. However, Arthur, Maud and their daughter Mary remained in Shaanxi. Arthur gave the following reason for remaining: -
Anti-Christian movement
Arthur's contributions to China were rewarded with the awarding of the Order of the Excellent Crop, Third Class, conferred upon him by the President of the Republic of China in 1917. Popular sentiment in the 1920s in China was directed against missionaries, foreign merchants, Christian schools, churches and hospitals which were viewed as 'imperialistic'. Arthur Shorrock helped organise the 1925 Shensi Baptist Conference, writing a book that argued that missionaries were not imperialist. At the time he wrote: Many missionaries were forced to leave China in the following years. For the Baptist Missionary Society such experiences resulted in them becoming more sensitive to the political situation of different mission fields.
Evangelical methods
The evangelical methods used at the time in Shaanxi were described as follows:
Return to England
While missionaries and other foreigners were besieged in Sianfu, Arthur's wife, Maude, died on 25 September 1925 of typhoid. After his retirement, he returned to Wraysbury and became the minister of the Baptist Chapel there. He died on 13 June 1945 in Windsor, aged 83, and is buried in Wraysbury together with his wife.