Abstract：Using dwarf cucumber（Cucumis sativus L.）line D0462 as experiment material, we conducted observation on the morphology of dwarf cucumber mutant D0462 and the microexamination of vegetable shoot apical meristem（SAM）differentiation dynamic status in dwarf cucumber. The result showed that D0462 is multi-branching and short plant, its vegetable shoot usually consolidated on the top of FLOB and could elongate to an axillary branch without dormancy and elongation suppression phenomenon. The differentiation process included vegetative stage，elongate stage, and single ridge stage. The partial SAM in single ridge stage became reproductive from vegetable top. The values of diameter/height gradually went down during the 3 stages. D0462 ripened faster than the sprawl cucumber D9419, and went into reproductive stage on the 15th day after its cotyledon coming out of the earth.
