The invention discloses a concentration device of a green vegetable green protecting agent production line. The concentration device comprises a work table, wherein the surface of the right upper endof the work table is provided with a water condensation tank; a support frame is arranged at the surface of the left upper end of the work table; the upper side of the support frame is fixedly connected with an evaporation concentration tank; a lateral support frame is arranged at the surface of the left upper end of the work table; a switch and a power wire are respectively arranged at the surface of the left upper end of the lateral support frame; the upper end surface of the lateral support frame is fixedly connected with a transmission box; the center inside the transmission box is rotationally connected with a cam through a second motor; the upper end surface of the cam is glidingly connected with a U-shaped guide rod. The goal of vertically and reciprocately winging green protectionagent raw liquid injected into the evaporation concentration tank by winging blades is realized; the swung green protection agent raw liquid is fully mixed and can be uniformly and fully heated by steam at the outer side; the scrapping cleaning on filtering slag is realized; the effect of collecting condensed liquid is improved.