  In this paper we study the supersymmetric generalization of the new soft
theorem which was proposed by Cachazo and Strominger recently. At tree level,
we prove the validity of the super soft theorems in both ${\cal N}=4$
super-Yang-Mills theory and ${\cal N}=8$ supergravity using super-BCFW
recursion relations. We verify these theorems exactly by showing some examples.
