In this paper,authors investigated the forming process of VAM in the root of honeysuckle.Results showed that:(1)when honeysuckle’s root was infected by VAM fungi,appressorium appeared firstly in the root epidermis,and then hyphae invaded cortical cells.There were down with linear and looped hyphae to form finaly in the cortical cells.Vesicle appeared at the end of the hyphae;In the thick hyphae,very tiny and dense mycelium appeared.It looked like a crown that was the arbuscular.some coarser hyphae could pass through two neighboring cortical cells and formed arbuscular continuously.When VAM hyphae formed arbuscular,VAM hyphae inflated and formed a emulsion bumps and then grow out of a short and thick stalk hyphae,then wiched broom.(2)There were three VAM hyphae morphological types in honeysuckle cortex cells:the stretching,hyphal coils and arbscule;honeysuckle with VAM mycorrhiza should belong to mixed mycorrhizal.(3)There were at least three types of VAM fungi spores in the honeysuckler’s rhizosphere,so honeysuckle formed a symbiotic relationship with at least three kinds of VAM fungi.(4)Available phosphorus content of the soil planting honeysuckle was 6.6 mg/kg that was significantly higher than that of the no plant soil’s (3.5 mg/kg);Impregnation rate of the VAM was 81% in the vigorous growth season (late April to midMay).