The invention discloses a skid-mounted device for switching and monitoring the process flows of water dissolving method mining, which comprises flanges, sampling ports and valves. An iron box is arranged on a skid; both front and back sides of the iron box are provided with movable plates; a valve for switching between normal circulation and reverse circulation is arranged in the iron box; flow meters, thermometers and pressure gauges are arranged on a pipeline in the iron box; the sampling ports and the flanges are arranged on a pipeline out of the iron box; and the flanges are connected with a wellhead through an underground pipeline. The flow meters, the thermometers and the pressure gauges are packaged in the iron box; and a top cover of the iron box leans forward and backward. The skid is welded by two I-shaped longitudinal steel and two horizontal square steel. The flanges are connected with two main pipelines and are connected with curved pipes of the wellhead through two underground pipelines respectively; and the curved pipes are connected with a central pipe valve and a middle pipe valve respectively. The device greatly simplifies the current wellhead device, makes the operation of a wellover rig convenient, can lift and move integrally, reduces the workload and the loss of equipment, is durable and can be reused.