Abstract: To solve the LTE (long-term evolution) interference problem in the two-line interchange area of urban rail transit with 1.8 GB dedicated frequency band, the interchange station (Pukou Station) of Fuzhou Rail Transit Line 4 GOA4 (unattended train operation) grade FAO (fully automatic operation) line and Fuzhou Rail Transit Line 5 GOA2 (semi-automatic train operation) grade FAO line is taken as an example, and the LTE anti-interference design and 1.8 GB frequency band planning of the two-line interchange area are studied in depth through the analysis and field test of TD (time division)-LTE technology. The LTE anti-interference solution of the interchange area of Line 4 and Line 5 is formed, providing a reference for the solution of similar problems of the subsequent rail transit lines in Fuzhou.