Surface acoustic wave filter used for digital television

The utility model relates to the technical field of surface acoustic wave filters, and relates to a surface acoustic wave filter used for a digital television. The surface acoustic wave filter comprises a piezoelectric substrate, an input interdigital transducer, and an output interdigital transducer. The output interdigital transducer comprises two comb handle electrodes disposed parallel with each other. A plurality of electrode units are disposed side by side at equal interval on each comb handle electrode between the two comb handle electrodes along a length direction of the comb handle electrode. Each electrode unit comprises two first electrode fingers and two second electrode fingers. Along the length direction of the comb handle electrode, in each electrode unit, positions of the two first electrode fingers are adjacent, two second electrode fingers are adjacent, and the first electrode fingers and the two second electrode fingers are arranged side by side at an equal interval. A top end of the first