The invention discloses a tea tree trimming device in the technical field of trimming tools. The device comprises an articulated shaft, a liquid medicine delivery system and two cutting edges, and theliquid medicine delivery system is arranged between the articulatedshaft and a handle portion; the cutting edgesare provided with edge portionsandliquid discharge portions, the liquid discharge portionsare cavities, the cavitiesare provided withpistons andball liquid discharge mechanisms, the ball liquid discharge mechanismsare arranged above the pistons, the bottoms of the pistonsare provided with vertical racks, the vertical racksare meshed with driven gears, and the liquid discharge portionsare provided with liquid inlet passages communicated with the cavities and the liquid medicine delivery system; the cutting edgesare further internally provided withsector gears, driving gears and sliding grooves, the sector gears are in rotation connection withthe articulated shaft, the sector gears aremeshed with the driving gears, the sliding groovesare internally provided with transverse racks, the driving gears mesh with the bottoms of the transverse racks, the tops of the transverse racksmesh with the driven gears, the sector gears are provided with power arms, and the power arms penetrate through the insides of the cutting edges to the handle portion. The device solves the problem that protective liquid cannot be applied to trimmed wounds while trimming tea trees.