A detection device for measuring an antenna is disclosed, wherein the detection device is provided with a probe seat made of a reflected wave absorbent material; a front end of the probe seat is provided with an extending front arm for connecting to a probe; and a rear end of the probe seat is provided with a connector, of which one end is for connecting to a detection instrument and the other end is electrically connected to the probe through the front arm, thereby when measuring an antenna, the probe seat can absorb reflected waves from the antenna to measure the quality of the antenna pattern.