The present invention relates to a needle piercing device comprising: a needle base (10)； a needle (20)； a first structural member (30) disposed outside the needle base (10), slidably engaged with the needle base (10) in a needle extension direction (20) and provided with a first restraint mechanism configured to restrict the first needle base separating structural member (30) (10) along the needle extension direction (20)； and a second structural member (40) disposed outside the first structural member (30), slidably engaged with the first structural member (30) along the needle extension direction (20), and provided with a second restraint mechanism. configured to constrain the second structural member (40) from separating the first structural member (30) along the needle extension direction (20). the first structural element (30) and the second structural element (40) are configured to receive the needle (20) within the second structural element (40) by sliding along the needle extension direction (20). The present invention has the advantages of operator convenience and skin comfort for a patient, and the structural members (30, 40) above the needle base (10) can quickly cover the needle (20) after use. In addition, the connections between the structural members 30, 40 and the base of the needle 10 are secure so that the structural members 30, 40 do not fall, effectively improving product safety.a presente invenção refere-se a um dispositivo para perfuração de agulha compreendendo: uma base da agulha (10)； uma agulha (20)； um primeiro elemento estrutural (30) disposto fora da base da agulha (10), encaixado de forma deslizante com a base da agulha (10) em uma direção de extensão da agulha (20) e provido com um primeiro mecanismo de restrição configurado para restringir o primeiro elemento estrutural (30) de separação da base da agulha (10) ao longo da direção de extensão da agulha (20)； e um segundo elemento estrutural (40) disposto fora do primeiro elemento estr
