Aiming at the problem of limited measurement data and relatively low detection accuracy of planar array sensors with 16 and below electrode plates in the capacitance tomography system, as well as the complexity of three-level control of 64 electrode plates, a capacitance tomography system based on 64 electrode two-level control dense planar array sensors has been developed. Through hardware two-level line selection control and software sensitive electrode measurement method, the speed and accuracy of capacitance tomography imaging have been significantly improved. Theoretical calculations and experimental results show that the capacitance tomography imaging accuracy of the 64 electrode dense planar array sensor with secondary control reaches over 95%, and the speed reaches about 2 s, proving the feasibility and effectiveness of this design in the field of non-destructive testing of composite materials.