The event takes place at the Olympic Stadium over the weekend of July 24-26.
The Sunday (July 26) is National Paralympic Day and the event will double as the IPC Athletics Grand Prix Final.
Arnott, a T46 athlete due to restricted movement in his left shoulder, won his first senior IPC Grand Prix medal last weekend on his debut in Berlin.
He will be looking for more success at London.
However, before that the 18-year-old, who has run 11.45 seconds for the 100m, has the IWAS World Junior Games to look forward to in Holland.
The World Games to place between July 2 and July 8 in Stadskanaal.