The utility model discloses a detection apparatus for a response waveform of a dynamic var generation device, thereby solving a problem of distortion of first-hand sampling information of response time testing of a dynamic var generation device in the prior art. The detection apparatus is characterized in that a first current collecting circuit (2), a transformer (9), and a voltage transformer (11) are respectively and electrically connected to a bus (1); a circuit breaker (3) is arranged between the bus (1) and the first current collecting circuit (2); a secondary side A phase of a first current collecting circuit current transformer (4), a secondary side A phase of a connection transformer high-voltage side current transformer (8), a secondary side A phase of a connection transformer low-voltage side current transformer (6), and a secondary side A phase of a transformer low-voltage side current transformer (10) are electrically connected with input terminals of an oscillograph (12); and a secondary side A phase of a voltage transformer (11) is electrically connected with voltage waveform input terminals of the oscillograph (12). According to the utility model, the testing can be carried out accurately; and the provided detection apparatus is suitable for application to the power grid site.