Safety protection mechanism of sewing machine

The safety protection mechanism of the sewing machine comprises a sewing machine body and a protective cover, the sewing machine body is provided with a machine head, the machine head is provided with a needle rod extending downwards, the bottom of the needle rod is provided with a machine needle, and the side face of the protective cover is provided with a first opening for the needle rod to enter. The bottom face of the protective cover is provided with a second opening allowing a machine needle to penetrate through, the upper end of the protective cover is provided with a plurality of clamping hooks, the upper ends of the clamping hooks are provided with clamping blocks protruding outwards, the bottom face of the machine head is provided with receding notches allowing the clamping hooks to extend upwards, and one side of each receding notch is provided with a supporting part used for bearing the corresponding clamping block. The protective cover is clamped in the corresponding receding notch through the cl