A needle head manual retraction type intravenous infusion needle comprising: a needle sheet (1) comprising a cylinder portion (11) and an end sheet portion (12)； Needle tube (2) is the end is installed in the cylinder (11)； A built-in slide sleeve 3 in which the cross section is a long strip block which is close to the letter C shape and is penetrated at both ends； And a protective housing 4 having a long strip shape and a hollow housing having both ends penetrated therethrough. And the cylinder portion (11) is installed in the built-in slide sleeve (3) and slides back and forth； The built-in slide sleeve (3) is installed in the protective housing (4) and slides back and forth, and a locking structure is formed between the needle sheet (1) and the protective housing (4)； After the needle sheet 1 and the protective housing 4 are unlocked, the needle sheet 1 is pulled backward so that the cylinder part 11 slides to the locked position of the built-in slide sleeve 3 so as to be locked. Then, when the needle sheet 1 is pulled backwards, the needle sheet 1 leads the internal slide sleeve 3 to slide to the locked position of the protective housing 4 so that the needle sheet 1 is locked. 2) is completely covered by the protective housing 4 and the tip of the needle is not exposed to the outside. The device can prevent puncture wounds and cross infections, reduce damage of the acupuncture tube 2 to the patient's inner wall of the blood vessel, and the product design is compact, which is convenient for use and simple in the production process.침 헤드 수동 리트랙션 타입 정맥 수액 침에 있어서, 실린더부(11)와 엔드 시트부(12)를 포함하는 침 시트(1)； 끝부분이 상기 실린더부(11) 내에 설치되는 침 관(2)； 횡단면이 문자 C형상과 근사하고 양단이 관통된 롱 스트립 블록(long strip block)인 내장 슬라이드 슬리브(3)； 및 롱 스트립 형상이고, 양단이 관통된 중공 하우징인 보호 하우징(4)； 을 포함하고, 상기 실린더부(11)는 상기 내장 슬라이드 슬리브(3) 내에 설치되고 전후로 슬라이드 가능하고； 상기 내장 슬라이드 슬리브(3)는 상기 보호 하우징(4) 내에 설치되어 전후로 슬라이드 가능하고, 상기 침 시트(1)와 상기 보호 하우징(4) 사이에 잠금 구조가 형성되고； 상기 침 시트(1)와 상기 보호 하우징(4)이 잠금 해제 된 후 후방으로 상기 침 시트(1)를 당겨 상기 실린더부(11)가 상기
