Adjusting device of channel for machine tool

The utility model provides a channel adjusting device for a machine tool, which is characterized in that guide wheel parts are respectively arranged on two sides of the tops of two opposite channel wall plates, a plurality of limiting guide channels are respectively arranged on two side edges of two opposite outer surfaces, and two opposite base plates are arranged on two side edges in the vertical direction, namely a channel space is formed in the channel adjusting device. The tops of the two base plates are respectively provided with a guide rail for movably erecting each guide wheel part at the tops of the two channel wall plates, and the two base plates are respectively provided with at least two groups or more than two groups of adjusting mechanisms for driving the two channel wall plates to move towards the opposite inner sides or outer sides; and at least two groups or more than two groups of adjusting mechanisms are provided with rolling guide wheels which are respectively embedded in the limiting gui