The utility model provides an overturn trigger device and a pedimeter employing the same. The trigger device comprises a fixed bracket, a first clamping part, and a second clamping part, wherein the fixed bracket and the first clamping part are connected through a first spring rotating shaft; the first clamping part and the second clamping part are connected through a second spring rotating shaft; a contact is arranged on the first clamping part, and a notch matched with the contact is arranged on the fixed bracket. The pedimeter comprises a step recording device containing the overturn trigger device, and the step recording device is provided with a trigger key. The overturn trigger device provided by the utility model can be combined with a plurality of machines to realize the overturn triggered switch-on effect, and is convenient for a user to check the work condition of the related machines.