  Recent researches of the novel $4D$ Einstein-Gauss-Bonnet (EGB) gravity have
attracted great attention. In this paper, we investigate the validity of the
weak cosmic censorship conjecture for a novel $4D$ charged EGB black hole with
test charged scalar field and test charged particle respectively. For the test
charged field scattering process, we find that both extremal and near-extremal
black holes cannot be overcharged. For the test charged particle injection, to
first order, an extremal black hole cannot be overcharged while a near-extremal
$4D$ charged EGB black hole can be destroyed. To second order, however, both
extremal and near-extremal $4D$ charged EGB black holes can be overcharged for
positive Gauss-Bonnet coupling constant; for negative Gauss-Bonnet coupling
constant, an extremal black hole cannot be overcharged and the validity of the
weak cosmic censorship conjecture for a near-extremal black hole depends on the
Gauss-Bonnet coupling constant.
