The invention relates to a storage card dustproof device comprising a shell and a clamping notch. The clamping notch is arranged in the shell for holding storage cards. The storage card dustproof device also comprises a dustproof cover and at least one spring. The dustproof cover is provided with a main body and used for sealing the clamping notch. The main body comprises a pivotal edge and a rotary edge parallel to the pivotal edge. The pivotal edge is fixed at the inner side of the clamping notch. The rotary edge can rotate relatively to the pivotal edge when the storage cards are inserted or taken out. The spring can provide elastic force when the rotary edge rotates and restore the dustproof cover when the storage card is taken out. The storage card dustproof device further comprises a fixing element, at least one shell groove and a triangle screw tooth seat. The fixing element and the triangle screw tooth seat are respectively arranged at the opposite two sides of the clamping notch. The storage card dustproof device of the invention can prevent dust from entering the storage card and lead to the convenient insertion and extraction of the storage cards.