The invention discloses a folding gasket type unilateral bolt fastener. The unilateral bolt fastener comprises a round head screw nut and a screw rod, and a folding gasket assembly, a sleeve, a gasketand a nut which are sequentially sleeved on the screw rod, wherein a plurality of protrusions are uniformly arranged on the surface of one end of the sleeve in a circumferential manner, the folding gasket assembly comprises a plurality of first-layer folding gaskets close to the sleeve and a plurality of second-layer folding gaskets close to the round head screw nut, one ends of the first-layer folding gaskets are connected with the protrusions on the sleeves through connecting hinges A, and the other ends of the first-layer folding gaskets are connected with the second-layer folding gasketsthrough connecting hinges B. Compared with the prior art, the folding gasket assembly is added, meanwhile, the connecting hinges of the first-layer folding gaskets and the second-layer folding gasketsare provided with frictional resistance, the two layers of the folding gaskets form a certain angle, so that the folding gaskets can be folded normally during working, and installation failure is avoided. The unilateral bolt fastener solves the problem of unilateral fastening, is simple in principle, safe, reliable, good in mechanical property and convenient to install.