The invention relates to a high-efficiency air purifier for a wood processing workshop. The high-efficiency air purifier for the wood processing workshop comprises a body, a first air outlet, first air inlets, moving wheels, a fan, a pipeline, a detecting mechanism and a purifying mechanism; the detecting mechanism comprises a first driving component, a detecting component, a first connecting rod,a second connecting rod, a guide rail, a third connecting rod and a first moving block; the purifying mechanism comprises an outer shell, a second air outlet, a second air outlet, a filtering element, a collecting tank, a gear rod, a piston, a first transmission rod, a second driving component and a cleaning component. According to the high-efficiency air purifier for the wood processing workshop, the content of wood dust in air at various positions in the workshop can be detected through the detecting mechanism, so that the air purifier can perform purifying aiming at the position with highcontent of the wood dust, and the purifying effect of the air purifier is improved; the filtered wood dust in the air purifier can be collected through the purifying mechanism, so that the recycling and utilizing of the wood dust are realized, and the utilization rate of wood is improved.