• It is safety and reliable for puncture by positioning of puncture conical and conversion cap. • Non-cutter design minimally invasive puncture, can prevent abdominal wall and vascular to be injured. • Anti-slip thread design casing, make it firmly fixed on abdominal wall and the depth can be controlled. • The silicone sealing ring with good airtight, make the puncture with small resistance. • For single use,it is effect to avoid the cross infection in laparoscopic surgery.