  We give shuffle algebra realization of positive part of quantum affine
superalgebra $U_{v}(\widehat{\mathfrak{D}}(2,1;\theta))$ associated to any
simple root systems. We also determine the shuffle algebra associated to
$\widehat{\mathfrak{sl}}(2|1)$ with odd root system when $v$ is a primitive
root of unity of even order, generalizing results in \cite{FJMMT03}.
