The invention relates to a travel region extraction method and system for a vehicle. Specifically, region division is performed on the surroundings of the vehicle, barrier grid information is regionalized, then a barrier grid most concerned by an automatic driving vehicle action is found out, and a travel region is delimited according to the barrier grid. Through the travel region extraction method and system, acquired travel region information can be conveniently and directly used for travel route planning of a path planning system; moreover, extraction and processing of barrier information are reduced according to electronic fence constraint and non-concerned barrier information, so that resource occupation is reduced, processing efficiency is improved, and the possibility of making a mistake is lowered; and the safety and reliability of an automatic driving system are improved, meanwhile, the hardware requirement on the system is lowered, and development and application of automaticdriving are promoted.