Fault alarm electric control cabinet for rail transit

The utility model relates to the technical field of electric control cabinets, and discloses a fault alarm electric control cabinet for rail transit, which is characterized in that a plurality of groups of guide fixture blocks are mounted in a cabinet body of the control cabinet in a pairwise symmetrical manner, and the control cabinet is in guide insertion with a plurality of groups of separation box mechanisms through the guide fixture blocks; the two sides of the cabinet body of the control cabinet are symmetrically provided with two sets of ventilation opening and closing mechanisms. According to the utility model, through the combination of the ventilation fan and the exhaust window on the separation box mechanism, mechanical heat generated by internal components of the separation box frame can be timely and autonomously cooled by air, and then a cold air circulation mode is formed by opening and closing an opening and closing hinge in the ventilation opening and closing mechanism, so that external cold