Track switch fault detection device and method

The invention provides a track switch fault detection device and a method and relates to the track switch field. According to the method, a gradient of a fitting line of a curve formed by coordinates of current values corresponding to each continuous N time points of a to-be-detected track switch current motion curve is calculated, variances of current values corresponding to multiple time points in each work state time segment of the to-be-detected track switch current motion curve and current values corresponding to multiple time points in a work state time segment of a corresponding pre-stored standard track switch motion current curve are respectively calculated, if one or more variances acquired through calculation is greater than a preset threshold, a specific fault result is generated on the basis of the work state time segment corresponding to the variance. According to the method, fault results generated on the basis of different work state time segments corresponding to the variances greater than the preset threshold are different, so precise positioning on a specific abnormal problem can be carried out, specific processing advices can be further provided, and a variance determination method is easy to master and is easy to carry out.