Abstract: In order to effectively prevent illegal intrusion into power tower lines such as human destruction and animal disturbance, a perimeter intrusion recognition algorithm for power tower lines under continuous millimeter wave linear signal reconstruction is proposed. Using millimeter wave active radar sensors to collect perimeter signals of power tower lines. Reconstruct continuous millimeter wave linear signals through compressive sensing algorithms. Perform fast Fourier transform on both fast and slow time dimensions to obtain the location and velocity of intrusion targets, and achieve identification of intrusion targets around power tower lines. The experimental results show that the algorithm can effectively identify perimeter intrusion of power tower lines, ensuring the reliability of power system transmission line operation.