The invention relates to an emulsified displacement-permeation oil recovery agent which is composed of the following components in percentage by mass: 25-60% of glycidol ether, 2-30% of assistant, 8-30% of co-activator, 5-20% of catalyst and the balance of water. In the oil recovery agent compounded from multiple components, the assistant glycidol ether has higher surface activity, the oil recovery agent can be effectively applied into the low-permeability reservoir under the recombination actions of the assistant and co-activator, overcomes the defects of small pores, thin throats and large specific area in the low-permeability reservoir, and achieves the goal of high-efficiency oil displacement. The oil displacement efficiency is up to 42.5-44.6% or so, which is greatly enhanced as compared with that of the existing oil displacement agent.