Semi-automatic safety needling instrument

The invention discloses a semi-automatic safety needling instrument. The semi-automatic safety needling instrument comprises: a safety sleeve drum, which is provided with an upper sleeve drum inlet and outlet opening and a lower sleeve drum inlet and outlet opening; a needle drum, which is provided with a needle drum combination part and a needle drum liquid outlet; at least one automatic combination integral device, which comprises an integral terminal force storage part; at least one assembly guide contraction and expansion device; at least one anti-falling self-destruction limiting device;and a two-way non-return limiting part. Thus, through the elasticity of the assembly guide contraction and expansion device and the automatic combination integral device, the assembly and operation power requirements of the needle drum and the safety sleeve drum are reduced; by virtue of the elastic potential energy accumulated by abutting against the outer wall of the needle drum, when the safetysleeve drum moves to a co