The invention relates to the technical field of
agriculture and
forestry, and provides a jujube tree high-photosynthetic-efficiency tree shape forming method which comprises the following steps: shaping in the first year: determining a
trunk at a position 1.2 m away from a
young tree, retaining plump buds under a
cut, promoting two young shoots (parallel to a bracket) in opposite directions to germinate within 20 cm below the
cut, meanwhile, other sprouts are erased to centralize nutrients to promote growth of new trunks and young sprouts; three
layers of supporting frames are arranged; when the trunks grow to 2 meters and young sprouts grow to 30-40 cm, selecting and remaining main branches on the first layer, pulling the branches and fixing the branches on the first layer of the supporting frame, and meanwhile, reserving the central leading
trunk. Shaping in the second year: after winter
pruning is carried out, all branches on the central leading
trunk are removed,
bud carving is carried out at the positions 50 cm and 100 cm away from the first layer of main branches to culture a second layer of main branches and a third layer of main branches, when the main branches grow to 30-40 cm, the main branches are fixed to the second layer and the third layer of the supporting frame respectively, and a tree shape shaped like a Chinese character'feng 'with three
layers of
main branch frameworks is formed. The method can form a big tree in one year in transformation of the big tree shape, and the culture period is greatly shortened.