Intracavitary surgical instrument

An intracavitary surgical instrument, comprising:

• a driving component (2), comprising a connecting portion (3), the connecting portion (3) comprising a hollow rod member (31), the rod member (31) comprising a connecting end (311), the connecting end (311) comprising a contact ring surface (3111) and an insertion head, the insertion head protruding from the contact ring surface (3111);
• and
• an operating component, comprising a sheath portion (4) and a moving portion (5), the sheath portion (4) having a match end surface (461) and a first containing hole the first containing hole (44) being a through hole, the moving portion (5) comprising a traction portion (53), a first operating arm (51), and a second operating arm (52), the second operating arm (52) being disposed on the sheath portion (4);
• wherein one end of the traction portion (53) is connected to the first operating arm (51), and the other end of the traction portion (53) is operably passed through the rod member (31) and pulls the sheath portion (4) to move toward the rod member (31) until the insertion head is detachably inserted through the first containing hole (44), and the contact ring surface (3111) abuts the match end surface (461), the traction portion (53) being configured to drive the first operating arm (51) to approach the second operating arm (52).