Allometric relationships between height and basal diameter reflect the tradeoff ofresource allocation between vertical and horizontal growth in trees under different environmental conditions. Understanding the effects of pruning on the allometric relationship between height and basal diameter can contribute to exploring the tree resource allocation mechanism underenvironmental stress. This study investigated the effects of pruning methods on growth and allometric relationship between height and basal diameter ofMoringa oleifera in Yuanmou dry and hot valley. The results showed that there were significant differences in height and basal diameter among pruning 50%, pruning 100%, pruning 100%+topping and control treatments (P<0.05). At the late stages of measurement (12 and 16 weeks), there was no significant difference in height between pruning 50% and control treatments (P<0.05) and the growth rates in basaldiameter of pruning 50% and pruning 100% were higher than that in control treatment, implying thatM. oleifera  might evolve compensatory growth after pruning. The General Linear Models (GLMs) and the Standardized Major Axis Estimation (SMA) had the same determinationcoefficients, but the allometry coefficients of GLMs were lower than that of SMA (84.9%-91.9%). Allometry coefficient increased with the increases of pruning intensity, whereas topping decreased the coefficient. Such a phenomenon indicated thatM. oleifera would allocate moreresources to vertical growth under pruning, while topping had the opposite impacts. Pruning 50% was recommended for the management ofM. oleifera in practice.