The auto-manual right-angle head combined the features of automatic right-angle head and manual right-angle head,with an extra function of small-angle-indexing upon the original structure of the automatic right-angle head.The auto-manual right-angle head can be used to realize a full range of 360°machining function because it can work in a certain angle given by endtooth couplings,also can be used in some special angles when the precision is ensured by manual alignment.