Automatic anti-needling syringe

The utility model relates to an automatic anti-needling syringe, which comprises a push rod assembly, a medicine cylinder, a syringe needle cap, an inner shell and an outer shell, the push rod assembly can be installed in the medicine cylinder along the Z-axis direction, the medicine cylinder can be installed in the inner shell along the Z-axis direction, the syringe needle cap is installed at the bottom of the medicine cylinder, and the inner shell can be installed in the outer shell along the Z-axis direction. When the inner shell body is pressed to the lower protection clamping groove of the outer shell body, the inner shell body protection clamp is opened by means of the elastic force of the inner shell body protection clamp to be in contact with the lower protection clamping groove of the outer shell body, and then the inner shell body protection clamp and the lower protection clamping groove are buckled together, so that a product can be pressed downwards to move in a limiting mode. When product injecti