The invention discloses a light pollution prevention precise focusing stroboscope lamp, and the stroboscope lamp comprises protection glass, LED lamp beads, an aluminium substrate, a thermal conduction plate, a circuit board assembly with a control circuit, and a heat dissipation housing. The LED lamp beads are welded on the aluminium substrate in an array manner, and the aluminium substrate is connected with the thermal conduction plate through a fixing screw. The thermal conduction plate and the heat dissipation housing are connected with each other. Each LED lamp bead is provided with a focusing support, and a Fresnel lens is installed at the front end of the focusing support. The circuit board assembly is installed in the heat dissipation hosing. The stroboscope lamp is precise in focusing, is good in heat dissipation, and has a function of outputting strip-shaped light spots with the front and back areas being increased and a function of intelligent control.