The invention provides a liquid level switch detection device, which comprises a detection circuit and at least one detection branch connected in the detection circuit in parallel, wherein each detection branch comprises a liquid level switch and an indicator light, and the liquid level switch and the indicator light are connected in series; the detection circuit is also provided with a placementarea connected with the detection branch in parallel; the reed pipes of the liquid level switch are installed in the placement area; and when the placement area is electrified, the contacts of the reed pipes are closed. Compared with the prior art, the liquid level switch detection device provided by the invention is electrified to enable the placement area to generate a magnetic field, under thefunction of the magnetic field, the reed pipes realize a purpose that the liquid level switch and the indicator light are on and off, and a purpose of automatically detecting whether the liquid levelswitch is on and off can be realized. A plurality of mutually independent reed pipes are arranged in the liquid level switch, each reed pipe corresponds to the indicator lights of a plurality of parallel circuits, so that a plurality of liquid level switches can be simultaneously detected, time required for detection is shortened, detection speed and detection efficiency are improved.