Self-destruction pulling-down safe needle instrument

The invention provides a self-destruction pulling-down safe needle instrument. The self-destruction pulling-down safe needle instrument comprises an injection needle instrument containing a needle cylinder and a pushing cylinder, wherein a side part, adjacent to an outlet part of the needle cylinder, of the needle cylinder is defined by a snap-in fall-off notch part, a needle cylinder combination accommodating region is defined in the needle cylinder, a pushing cylinder sealing soft sleeve is combined and located onto the pushing cylinder, an integrated function combination is arranged at a side part of the outlet part of the needle cylinder and is provided with a combination liquid outlet and a combination combining part capable of being combined with a needle, a snap-in fall-off device and a limiting stopping device are arranged between the needle cylinder and the integrated function combination, a self-destruction device is arranged between the pushing cylinder and the integrated function combination and c