The present application provides a porous carbon material and a preparation method and application thereof, which includes following steps: choosing a distillate of ethylene tar in a range of 250° C.˜550° C.and performing hydrogenation treatment on the distillate to obtain hydrofined ethylene tar; performing pre-carbonization treatment on part of the hydrofined ethylene tar to obtain coke; mixing the remaining hydrofined ethylene tar and the coke to form a mixture, and performing activating treatment on the mixture to obtain the porous carbon material. The present application can realize the preparation of high purity porous carbon with simple preparation process and low cost.