Abstract: In order to solve the traditional detectors shortcomings of low speed and weak precision, to detect small sophisticated devices, and meet the demand of reconstructed images with high spatial resolution in low-energy X-ray microfocus CT systems, a small interval signal acquisition system is proposed. The system takes X-CARD 0.2-256G as the detector, which is highly integrated with fast scanning speed and only 0.2 mm pixel size, Cyclone EP1C3T as the core logic control module, and LXT972A as the Ethernet chip. The whole hardware and logic designations are described clearly in terms of the performance of reliable, stable and high efficiency. Then the dynamic range of the system is tested. Experimental results show that the proposed system has a dynamic range larger than 4000, can collect and transport the signal quickly and accurately, and can satisfy the requirements of ICT transmission sufficiently.