Sleeper beam assembling method of railway vehicle and sleeper beam

The invention discloses a sleeper beam assembling method of a railway vehicle and a sleeper beam, and belongs to the technical field of the railway vehicle. According to the method, the shearing of a left side web plate assembly, a right side web plate assembly, a first group of angle support plates, a second group of angle support plates, a third group of angle support plates, a separation plate, a lateral bearing reinforcing seat and a lower cover plate is realized through adopting fine plasma cutting equipment. The cutting precision of the fine plasma cutting equipment is higher, so the quality of each accessory manufactured by adopting the fine plasma cutting equipment for cutting is more stable, and the reworking rate after the assembly is reduced. The sleeper beam is assembled by adopting the method, the quality is more stable, and in addition, the finished product reworking rate is reduced.