The invention relates to a multi-element thermal fluid displacement process for recovering thick oil reservoirs, comprising the steps of: injecting multi-element thermal fluid in a thick oil reservoir through an injection well in an injection-production well group; and recovering thick oil from a horizontal production well. According to the multi-element thermal fluid displacement process provided, the thermal recovery effect of the thick oil is improved, the heat wave and the volume are enlarged, the stratum pressure is kept, the thick oil recovery ratio is improved, and the rapid and efficient development of the thick oil reservoirs is ensured.