The “preservation” or “excision” of the gallbladder has always been controversial in the medical community, but in recent years, minimally invasive gallbladder removal technology has received widespread attention from the medical community at home and abroad. It has become a general consensus in the medical field to preserve the functional gallbladder. Laparoscopic choledocholithotomy is a new concept and a new technology under the rapid development of medical technology. What are the indications for choledocholithotomy? 1. The gallbladder must not be too large or too small. 2, The gallbladder must have good contraction function. 3, no symptoms of gallbladder stones, that is, the so-called stone “resting state”. 4. The upper abdomen must not have a history of open surgery, perforation or other acute inflammatory disease. 5, oral cholecystography or lipid meal after ultrasound suggests: gallbladder contraction of more than 1/3 (good gallbladder function). 6.B ultrasound: gallbladder mucosa is smooth, gallbladder wall is within 3-4mm, stones are single or multiple, regular morphology, good intra-bladder translucency, gallbladder length diameter is between 5-8cm, and there can be no separation within the cyst.