A thin-plate type light-shielding cover (30) comprises a buckling part (35) buckled with an image acquisition module set (100) and a light incidence channel (34) passing through the light-shielding cover (30). External light enters a camera lens (21) via the light incidence channel (34); the light-shielding cover (30) has a first base surface (31) close to the camera lens (21) and a second base surface (32) opposite to the first base surface (31) and far away from the camera lens; the light incidence channel forms a first light inlet (341) on the first base surface (31) and a second light inlet (342) on the second base surface (32); and the size of the second light inlet (342) is larger than the size of the first light inlet (341). The invention further provides the image acquisition module set (100) having the light-shielding cover (30).