Anti-seepage film unwinding support

The utility model relates to the technical field of impermeable membrane construction, in particular to an impermeable membrane unreeling support which comprises two bases, the middle portions of the two bases protrude upwards, a plurality of through holes which are vertically arranged are formed in the side faces of the bases, and installation seats which can move vertically are arranged in the middle portions of the two bases. Compared with the prior art, the supporting device has the advantages that the two bases and the two mounting seats are arranged, meanwhile, the four limiting plates at the bottom ends of the mounting seats are located on the two sides of the middles of the two bases respectively, then limiting is conducted through the limiting pins, placing positions are conveniently provided for the two bearings, and meanwhile the two bearings are located at the two ends of the supporting steel pipe; a user enables the supporting steel pipe to penetrate through the middle of the anti-seepage film ro