CT puncture locating device and locating method

The invention discloses a CT puncture locating device which comprises two layers of locating nets, wherein the locating nets consist of frameworks, longitude lines, latitude lines and locating holes; two ends of the longitude lines and the latitude lines are connected onto the frameworks; the locating holes are formed in joints of the longitude lines and the latitude lines; longitude line marks are arranged on the outer sides of joints of the longitude lines and the frameworks; latitude line marks are arranged on the outer sides of joints of the latitude lines and the frameworks; the CT puncture locating device further comprises a first fixing device; the first fixing device is used for fixing a space between the two layers of locating nets to enable the locating nets on the upper and lower layers to keep parallel. The invention further discloses a locating method of the CT puncture locating device. According to the CT puncture locating device disclosed by the invention, by the use of the upper and lower laye