[en] Semi-plants of two-years old Phellodendron Chinense Schneid were labeled by ¹⁴CO₂ +CO₂ tracer. Girdled the phloem of the trunk and wrapped the barked trunk with plastic film. After ward, Specimens were made through combusting and then, the radioactivity was measured by Liquid Scintillation Counting (LSC). The results showed that the carrying speed for ¹⁴C-assimilates of non-girdled phloem were 52.0 cm/h which making it possible to carry assimilates from crown to the root system in about 3 hours. It were also indicated the distributing law for ¹⁴C-assimilates of the crown leaves: for the non-girdled, the middle leaves of the crown were highest, bottom lowest and for the girdled, the top became highest while the bottom remained to be unchanged. Additionally, on the 15th day, ¹⁴C-assimilates were detected in the regeneration phloem and the parts beneath the barking position as well as the root system that indicated the physiological function of regenerated phloem had recovered. (authors)