Movable groove supporting device

The utility model discloses a movable groove supporting device which comprises a framework, the framework comprises an upper unit body and a lower unit body, each unit body comprises two H-shaped components arranged side by side and two telescopic transverse supports arranged in parallel, and each H-shaped component comprises two stand columns and a component cross beam connected with the two stand columns. The two ends of the transverse supports are hinged to the stand columns of the two H-shaped components respectively, the stand columns of the two unit bodies are connected in a sleeved mode, a plurality of second positioning holes distributed in the length direction are correspondingly formed in the connecting positions of the upper stand column and the lower stand column, and second fasteners are detachably arranged between the second positioning holes of the stand columns on the upper side and the lower side. A soil retaining plate is movably arranged on the H-shaped components of the two unit bodies, a