The utility model relates to a can realize jumbo size model multiple spot load distribution's experimental loading device belongs to the building structural technology field. This experimental loading device is by load system, loading system and load distribution system composition. Load distribution system through the string roof beam is opened for the space radiation type to the main part can act on the load that the middle part flew the post with the jack, according to the rigidity of the radial roof beam of each radiation direction with oblique pull rod, and each load point of automatic accurate distribution to experimental test piece to being the single -point loading with the simplification of multiple spot loading, reducing heavy frame and jack quantity that the laboratory needed, reduce required test site area, simplify the experiment loading procedure, it is consuming time to shorten the experiment, finally reduces experimentation cost.