The invention relates to an ethylene oxide waste gas treatment and energy recovery system. The system comprises an EO tail gas generating device, a tail gas absorbing device and an energy recycling device, wherein the tail gas absorbing device comprises a water ring type vacuum pump, a steam-water separator, a water storage tank, a plurality of combined type ethylene glycol reaction tanks and a combined type spraying tower; the energy recycling device comprises a waste liquid combustion spiral tube heat exchanger, a plurality of gas-water heat exchangers, a plurality of combined type air energy heat pumps, an activated carbon adsorption box and an induced draft fan, the waste liquid combustion spiral tube heat exchanger comprises a combustion tank, a waste liquid spraying device, a combustion-supporting gas jetting device and a compressed air jetting device. According to the invention, the waste liquid of ethylene glycol treated by the tail gas absorbing device and the ethylene oxide gas which is not absorbed by water are combusted, through automatic control, full combustion is guaranteed, and the ethylene oxide, ethylene glycol and other organic matters are completely converted into water and carbon dioxide to realize the zero emission of ethylene oxide, at the same time, a plurality of groups of heat exchangers are arranged, and the combusted energy is subjected to heat exchange application.