The utility model discloses a slide adjusting focus structure of shot -light, including cup jointing the overcoat on the lamp holder, include still that the slip cap establishes the endotheca in the overcoat, a plurality of elastically positioned device has been installed to the at least one end of endotheca, the endotheca passes through a plurality of elastically positioned device with the inner wall slidable ground elastic connection of overcoat can be according to the needs of use occasion, through the slide adjusting and then the change focus of endotheca to adjust the irradiation range of shot -light, use and adjust the convenience, additionally, the elastically positioned device can make the slip relative ratio between endotheca and the overcoat compacter, the elastically positioned device includes the positioning seat, establishes elastic salient on this positioning seat, and this elastic bulge's spring action power can prevent automatic slip the between the two to can fill the machining error between overcoat and the endotheca, it is not high with the precision requirement of endotheca to the overcoat, be favorable to production.