The invention is to solve the problem that an existing safety warning device is not comprehensive enough and discloses a safety warning device for electromechanical equipment. The safety warning device comprises a warning box, first fastening screws, slide bars, telescopic tubes, first spiral springs, fixation blocks, rotation boards, lamp covers, connection blocks, caution lights, second fastening screws, a rotation shaft, a first wire, switches, a second wire, third fastening screws, a positioning plate, a support frame, an installation block, first fastening screws, a power supply, pressingplates, second spiral springs, a guide rod, sleeve rings, a first friction layer, screw rods, a sliding plate, a first contact block, third spiral springs, a second contact block, a connection board,a second friction layer and guide slots. The device relates to the field of safety of the electromechanical equipment; through cooperation of the caution light, the first friction layer and the second friction layer, acousto-optic alarm can be carried out; and the safety warning device is safer, is convenient to operate and is safe and reliable.