Power transmission system and vehicle

The embodiment of the utility model provides a power transmission system and a vehicle. The power transmission system comprises a first power module, an input shaft, a first gear adjusting module, a second gear adjusting module, at least two sets of transmission modules and an output shaft. The first gear adjusting module comprises a first gear shifter and a first normally-meshed driving gear, the first gear shifter is connected with the input shaft, and the first gear shifter can selectively enable the input shaft and the first normally-meshed driving gear to be connected or disconnected; the second gear adjusting module comprises a second gear shifter and an output gear, the second gear shifter is arranged on the output shaft, and the second gear shifter can selectively enable the output gear and the output shaft to be connected or disconnected; the first normally-meshed driving gear is in transmission connection with the output gear through at least two sets of transmission modules which are in transmissio