Paper blocking device of thermal printer

The utility model discloses a paper blocking device of a thermal printer, which comprises a middle shell, a paper roll groove is arranged in the middle shell, a paper blocking plate is arranged in the paper roll groove, the paper blocking plate is provided with an elastic area, the edge of the paper blocking plate is provided with a first clamping hook part and a second clamping hook part, the first clamping hook part is arranged in the elastic area, and the second clamping hook part is arranged in the elastic area. The middle shell is provided with clamping holes corresponding to the first clamping hook part and the second clamping hook part. A rotary cover plate is arranged at the hinged position of a middle upper shell and a middle lower shell of the middle shell, and the rotary cover plate and the upper shell form a wiring channel. One clamping hook part of the paper blocking plate is arranged in the elastic area, the rotating cover plate can be turned over, and the paper blocking plate has the advantages