The utility model relates to a latch type door lock and a medium-voltage switch cabinet using the same. The medium-voltage switch cabinet is additionally provided with a lock hole coupling device on the basis of a conventional latch type door lock, that is, two parallel stop edges arranged at an interval and a locking platform inserted between the two stop edges are respectively arranged on a door panel and a cabinet body; and lock holes formed in both the stop edges and the locking platform are in splicing fit with the latch of the latch type door lock to ensure that the door panel is locked on the cabinet body, so that the medium-voltage switch cabinet is coupled together after the door panel is closed to form a locking structure similar to a latch; the locking effect is firm; the shock resistance is strong; the structure is simple; and further the problem that a latch type door lock mounted on the door panel of the medium-voltage switch cabinet in the prior art has low rigidity and strength is solved.