According to the literature search, the use of 3D printing to complete the preoperative simulation of fracture revision surgery and the successful implementation of laparoscopic internal fixation of acetabular fracture is the first case in the world. This is also the first time that 3D printing technology is applied to clinical treatment in Guangzhou. The pelvis was broken into multiple pieces after falling from a height Mr. Zhang, 43, fell from a height of 3 meters in an accident before the Spring Festival, resulting in a fracture of the right acetabulum and a fracture of the distal radius, while the right acetabulum bone, an important part of the pelvis, ruptured there and the intact pelvis faced collapse. Examination revealed that Zhang’s pelvis in this area, had fallen into multiple pieces and multiple bone fractures. ”If traditional incision and repositioning surgery is used, it will cause great trauma to the patient, more bleeding and a long recovery period”, said Jin Dadi, president of the hospital and an orthopedic specialist, and in order to reduce the patient’s surgical risk, the expert team considered using 3D printing technology to reconstruct his pelvis. Prof. Zeng Senjun and other experts from the orthopedic trauma department of the hospital used 3D technology to print a simulated pelvis model of the patient after simulating the reset through 3D reconstruction of the patient’s pelvis, and carried out a series of arguments such as data measurement of steel plates and screws, pre-bending of steel plates and design of screw entry pathways. The bending of the steel plate fits the actual height of the patient, and the depth of each steel nail implantation is just in line with the requirements of fixation and biomechanics. After practicing on the “printout”, the minimally invasive bone jointing was performed. With the first 1:1 surgical simulation, the expert team decided to abandon the traditional large open surgery and perform the first lumpectomy-assisted acetabular fracture internal fixation. 20-30 cm surgical incision became 4 small holes; 1000 ml of bleeding was reduced to 80 ml of bleeding. The bleeding volume …… experts said that with the pre-support of 3D printing technology, it also greatly reduced the time needed to repeatedly pre-bend the plate and measure the screws during the previous operation. The patient was able to turn and move around the same day after surgery and sit up the next day. The review of the plate position and the length of the screw implantation direction matched perfectly with the preoperative 3D printing simulation of the surgery. Prof. Jin Dadi introduced that this surgery is the world’s first “3D printed laparoscopic assisted internal fixation of acetabular fracture”. Link 3D printing new bone raw material is actually corn The 3D printer used in the hospital is produced in Germany, the material used for printing is biodegradable plastic PLA, mainly corn, cassava and other raw materials, not ordinary plastic. The material is biodegradable, bio-soluble, glossy, transparent, feel and heat resistance, but also has a certain degree of bacteria resistance, flame retardancy and UV resistance. According to international and domestic research and development for the extension of 3D printing technology, the application of the technology in medicine will be more common with the continuous progress of material science research such as printing materials. “For example, for patients who have had part of their pelvis removed, we can use 3D printing to reconstruct a complete pelvis for them.” Jin Dadi said.