The utility model relates to a heat collecting device, in particular to a superconductive flat plate collector which can realize heat collection at low temperature and quick heat transfer. The superconductive flat plate collector comprises an aluminium alloy frame, and the upper part and the lower part of the aluminium alloy frame are transversely distributed with copper tubes, wherein upper transverse copper tubes distributed transversely are divided into a first copper tube and a second copper tube, the second copper tube is inserted into the first copper tube, and two ends of the second copper tube are fixedly connected with the first copper tube to form an upper transverse copper heat conducting pipe; the lower transverse copper tubes are positioned at the lower part of the aluminium alloy frame; a plurality of copper tubes distributed lengthwise are distributed between upper and lower copper tubes distributed transversely at intervals, two ends of the copper tubes are respectively and fixedly connected with the upper and lower transverse copper tubes to form a completely sealed space, and a superconductive medium is filled in the sealed space. The heat collector can resist the low temperature of 60 DEG C below zero, and in the lower temperature environment of 60 DEG C below zero, the superconductive medium in the copper tubes is not frozen and can quickly transfer heat into a heat insulation water tank, thus improving the heat collecting efficiency and reducing heat loss.