The invention discloses a wool fabric softening and brightening agent and a preparation method. The wool fabric softening and brightening agent is prepared from the following components in percentageby mass: 92 to 98 percent of organic silicon emulsion and 2 to 8 percent of lanolin alcohol polyether, wherein the organic silicon emulsion is prepared from synthetic amino silicone oil, 107 glue, glycerol, an emulsifier, glacial acetic acid and de-ionized water; the synthetic amino silicone oil is prepared by carrying out condensation on D4 and HD-104 according to the mass ratio of 100 to (2 to 4) and adding an MM end blocking agent.