Ground wire suggestion device, the utility model relates to a ground wire installation safety protection field. Can not indicate the ground wire state in order to solve current device directly perceivedly, easily arouse the problem of accident, the device includes that power, a N photoelectricity diffuse reflection response trigger a delay switch and a N pilot lamp, and N is for being greater than 1 integer, whether photoelectricity diffuse reflection response triggers delay switch and is used for responding to the ground wire and exists, a N photoelectricity diffuse reflection response triggers delay switch and a N pilot lamp corresponds, photoelectricity diffuse reflection response triggers delay switch and the pilot lamp that corresponds is established ties, constitutes the series branch, and a N series branch is parallelly connected, and the power is looped in with the series branch. The utility model discloses can be audio -visual the state of demonstration ground wire, avoided the emergence of maloperation, be applicable to the state of suggestion ground wire.