The utility model discloses an excavator main valve and main valve pipeline protection device, the long magnet piece of enclosed mass, protective layer, support, short magnet piece, bolt, long magnet piece connecting hole is seted up to long magnet piece up end, the protective layer is rectangle, matcoveredn connecting hole A and protective layer connecting hole B are opened to the protective layer upper end, the support includes diaphragm and riser, diaphragm one end and the perpendicular fixed connection of riser one end, short magnet piece connecting hole is seted up to short magnet piece right -hand member face, the protective layer carries out bolted connection with long magnet piece, support, the support carries out bolted connection with short magnet piece. The utility model discloses an excavator main valve and main valve pipeline protection device's structural design uses fixing device to fix the canvas protective layer and places on excavator main valve and main valve pipeline surface the destruction of avoiding the main valve to receive rubble, dust, the ageing problem of pipeline of avoiding the main valve pipeline to arouse simultaneously owing to the sun insolate.