The invention discloses a field installation detection method for a dual-column horizontal opening-closing isolation switch based on a force-measuring contact. The current isolation switch field installation detection is lack of certain data guidance; instead, most of the field installation detection is carried out based on experiments; and consequently, a lot of hidden dangers are caused by poor assembling. The technical scheme adopted by the field installation detection method provided by the invention comprises the following steps of adopting the force-measuring contact to replace a self-included contact of the dual-column horizontal opening-closing isolation switch, and mounting the force-measuring contact on a conductive rod; performing single-phase switch-on and switch-off debugging; detecting a switch-off position; determining clamping force; detecting contact finger pressure in the switch-on and switch-off processes; and performing three-phase synchronism detection. According to the field installation detection method, the force-measuring contact is quite convenient to install and replace; force changes in the switch-on and switch-off processes can be read; and in addition, not only the measurement of the clamping force after switch-on, but also analysis on the switch-on in-place, the clamping force, the contact finger pressure of the contact and the contact finger deformation amount in the switch-on and switch-off processes, and three-phase switch-on and switch-off synchronism detection can be realized.