With the increasing degree of modularization and integration of avionic systems, the ARINC 818 standard is used to make the new-generation avionic system transmit large-capacity digital video information at high speed in real time, which requires higher quality for the transmitted signal.A new Continuous Time Linear Equalizer (CTLE) is designed based on the ARINC 818 protocol for high-speed signal transmission systems.On the basis of the traditional CTLE, the folded cascode topology structure is imposed on the output of the conventional first-order CTLE to form a secondary structure, which can increase the high-frequency gain and achieve the purpose of channel compensation.The simulation results show that: at the rate of 2.125 Gibit/s, the two-level equalizer structure has good compensation ability, and the horizontal opening degree of equalized eye reaches 0.87UI.