The density uniformity of polymer bonded explosives (PBX) has a great effect on its mechanical property and safety performance. A dual-standard computed tomography simultaneous scanning model was applied to measure the cross-section density distribution of PBX component with complex configuration. Polymethyl methacrylate (PMMA) and polytetrafluoroethylene (PTFE) having same configuration of PBX were used as standard density components. The distribution rule of CT values and linear relation of the cross-section of PBX and standard density components were studied by a fan beam CT scanning mode. CT values of different cross-sections were obtained via the threshold of gray-scale and extraction of gray-scale value using MATLAB software. The cross-section density of PBX component was obtained from the volume densities of standard components. The corrected coefficient k was calculated using the volume density of PBX measured by water displacement method. The linear correction of the cross-section density of PBX component obtained by calculation was carried out. The cross-section density distribution of PBX component with complex configuration on different height was obtained. Results show that the maximal relative deviation between the cross-section density and the volume density of PBX is 0.74%.