  We derive the extended Supersymmetric Galilean Conformal Algebra (SGCA) in
two spacetime dimensions by the method of group contraction on $2d$
$\mathcal{N}=(2,2)$ superconformal algebra. Both the parent and daughter
algebras are infinite-dimensional. We provide the representation theory of the
algebra. We adopt a superspace formalism for the SGCA fields, allowing us to
write them down in a compact notation as components of superfields. We also
discuss correlation functions, short supermultiplets and null states.
