Power transmission system for vehicle and vehicle comprising the same

A power transmission system for a vehicle and a vehicle including the same are provided. The power transmission system (100) includes: an engine unit (1) configured to generate a power; a transmission unit (2a) adapted to selectively couple with the engine unit (1), and configured to transmit the power generated by the engine unit (1); a first motor generator (41) coupled with the transmission unit (2a); an output unit (5) configured to transmit the power output by the transmission unit (2a) to at least one of front and rear wheels (210, 220) of the vehicle; a power switching device adapted to enable or interrupt a power transmitting between the transmission unit (2a) and the output unit (5); a second motor generator (42) configured to drive the at least one of the front and rear wheels (210, 220).