Pork tenderloin is a tender meat on the inside of pig spine. Big tenderloin and small tenderloin, big tenderloin is covered with ribs outside the lean meat connected with big ribs. Usually, the big row of bones is tenderloin, and the small tenderloin is a muscle on the inside of the spine, which is relatively small and tender. Pork is one of the important animal foods on people's table at present. Its meat is tender and easy to digest. Pork tenderloin is divided into outer tenderloin and tenderloin. In the back position, the outer ridge is above the back and runs through the whole back, so it is also called tongji, shoulder pole meat and hard ridge, which is tender and lean meat; The tenderloin is located on the lower side of the outer ridge, which is the most tender meat, long and round, with a slightly thin end. Because the tenderloin is too small, the lateral tenderloin is often used instead of the tenderloin when cooking.