The invention relates to an automatic dental crown remover, and belongs to dental medical equipment. The automatic dental crown remover consists of a crown hook, a shell, a connecting rod mechanism, an impact mechanism and a force applying mechanism. The automatic dental crown remover has the advantages that: the remover can set different force accumulation levels through the accumulated force ofthe spring as required and can accurately and safely finish the work of crown removal; and because a distance of 2 to 4mm is set between a crown hook connecting nut and a lower casing cap, the large impact force can be prevented so as not to damage the teeth.