The utility model relates to a transformer, in particular to a signal lightning-proof track transformer. The track transformer comprises an equipment side winding, a circuit side winding, a framework and iron cores. Two pairs of iron cores are provided, and each pair of iron cores is composed by the mutual buckling of two C-type iron cores which are fastened by a steel band; the framework presents a type of a Chinese character WANG; the equipment side winding and the circuit side winding are respectively wound in winding grooves at the two sides of a middle partition of the WANG-type framework, and then are sheathed on two adjacent iron core columns of the two iron cores; lead-out wires of the equipment side winding and the circuit side winding are respectively connected with lead-out terminals of the equipment side winding and the circuit side winding on a transformer shell body at the outer side of the framework; a shielding layer is wound in the equipment side winding, and the lead-out wire of the shielding layer which is connected with the steel band in a welding manner is also connected with the lead-out terminal of a lightning-proof ground wire on the transformer shell body. The signal lightning-proof track transformer has the advantages of simple structure, good safety, high reliability, high efficiency and good lightning-proof property.