The small self-propelled walk type mower is composed of reel bat, vertical header, machine rack, gasoline engine, transmission mechanism, hand throttel, hand controlled mechanism, land wheel, transmission mechanism and cutter constitution. After the gasoline engine power changes speed through the transmission mechanism, and changes the gear shift through clutch handle by clutch, it is sent to the land wheel, reel, transmission mechanism and cutter, the nearside divider separates the grazing which is needed to be cut from the grazing which is not needed to be cut, the reel holds the upright grazing or the lodging grazing then pushes them to the header for cutting, the transmission mechanism transmits the grazing to the left side of the mower then puts them on the ground neatly, in order to realize the technology innovation of grazing cutting and transmitting, at the same time to prevent the grazing from plugging on the header or winding on the reel. The machine which can adapt to the grazing mowing work on the lower hilly region, river table land and small block ground in plain region, is operated by one person's hands and has the advantages of easy operation, convenient transportation, lower cost and wide application prospect.