An agreement was settled between them that Suleiman-Shah should be the Sultan, Qutb ad-Din Mawdud his atabeg, that Jamal al-Din, Qutb ad-Din Mawdud's, vizier should be the vizier for Suleiman-Shah and Zayn al-Din Ali, the emir of the Mosul forces, should be commander of Suleiman-Shah's army. The reason he went to Hamadhan was that after the death of Prince Muhammad, son of Sultan Mahmud, the great emirs sent to Atabeg Qutb ad-Din Mawdud, lord of Mosul, requesting him to send them Prince Suleiman-Shah, so that they could invest him the sultanate. On 12 January 1160, Suleiman-Shah traveled from Mosul to Hamadhan.

He was proclaimed sultan at Baghdad in 1156/57, but was later defeated by Muhammad.

In 1152 after the accession of Sultan Muhammad, Suleiman-Shah along with others attacked Muhammad and he was granted the title 'Al-Melil al-Mustadir' by the caliph. After Sanjar had endured from the Oghuz, Suleiman-Shah took the command of the Khurasan army, although they proved too weak to deal with the Oghuz, Suleiman-Shah went to Khwarazm Shah, who married him to the daughter of his brother Aqsis. He was formerly with his uncle, Sultan Sanjar, who had made him heir apparent and put his name in the Khutbah on the pulpits of Khurasan. His three brothers Mahmud II, Toghrul II and Mas'ud became the Sultans of the Seljuk Empire.

His mother was Gowhar Khatun the daughter of Isma'il bin Yaquti. Suleiman-Shah was the son of sultan Muhammad I Tapar.

Sheikh malam suleiman