Calcification of renal cysts indicates that there are calcium salt deposits on the cyst wall of the kidney cysts, which are manifested as high-density shadow in imaging, in three cases: in the first case, the type of cyst itself is this type containing calcium salt deposits, which is manifested as calcification on the cyst wall of the kidney, this case distinguishes four types of cysts, in the second, third and fourth type of cases, there may be calcification on the cyst wall of the kidney, to see if it is combined with In the second, third, and fourth types of cysts, there may be calcification in the wall of the cyst to see if it is combined with other compartments or if there is a mass like thing inside. In the second case, some cysts may have hemorrhage during the growth process, and if these components of hemorrhage cannot be excluded, calcification may appear at a later stage. In the third case, the location of the kidney cyst obstructs the urine discharge from the pelvis and calyces, causing calcium salt deposits in the excretory system of the kidney near the wall of the kidney capsule, forming stones and calcification.