Complex sentence: Song Jiang is eager to recruit Li Ying to join Liangshan, so he asks Xiao Rang to impersonate a government official and lead some men in disguise as soldiers to the Li Family Village to pretend to arrest Li Ying for collaborating with outlaws.
Split into simpler sentences: Song Jiang is eager to recruit Li Ying to join the Liangshan cause. He asks Xiao Rang to disguise himself as an official and bring some men to the Li Family Village to "arrest" Li Ying for being in league with outlaws.