The disposable bladed trocar for laparoscopy consists of a puncture cannula and a puncture core. The main task of the puncture core is to penetrate the abdominal wall together with the trocar cannula and leave the puncture cannula on the abdominal wall. The main task of the puncture cannula is to allow various surgical instruments to enter the abdominal cavity, so that the doctor can perform surgical operations and complete the surgical task.