Certificate card sleeve

The utility model discloses a certificate card sleeve which comprises the following components: a front panel which is provided with an opening, a first side edge of the front panel is provided with a first extension part, a second side edge of the front panel is provided with a second extension part, and a third side edge of the front panel is provided with a third extension part; a gap for accommodating a certificate is reserved between the inner plate and the front panel, the certificate is displayed through the opening, and the inner plate is provided with a fourth extension part; the first extension portion, the second extension portion and the third extension portion are connected on the back face of the certificate card sleeve to form a back face panel, a gap used for containing objects is formed between the back face panel and the inner plate, and the back face panel is connected with the fourth extension portion in a buckled mode or bonded with the fourth extension portion through a hook-and-loop fas