The utility model discloses a skid-mounted type multi-well automatic well selecting and metering device special for coal bed gas and belongs to the field of gas field ground engineering industry for coal bed gas. The automatic well selecting and metering device at least comprises a multi-well well selecting and metering system, a fuel gas metering system, an intelligent control cabinet, a base, related circuits and related pipelines. The multi-well well selecting and metering system and the fuel gas metering system are communicated with each other through the main output pipeline of the related pipelines, and are integrated on the base together with the intelligent control cabinet in the skid-mounted manner to be placed around the block of a coal bed gas wellhead and connected with the gas feeding pipelines and the exportation production manifolds of a plurality of single wells to realize the gathering and transportation of cold bed gas. Based on the combination of the automatic well selecting system, the automatic metering system and the automatic monitoring system, the low-cost development and the long-period unattended operation of the gathering, transporting and metering system for coal bed gas are realized, while the labor cost is lowered. The skid-mounted type multi-well automatic well selecting and metering device special for coal bed gas is simple and reliable in the control over well selecting automation, convenient in integral migration, lower in on-site construction workload, small in occupation area and short in construction period.