Output circuit and output method of random number generator

The invention discloses an output circuit and an output method of a random number generator. The output method comprises the following steps: carrying out xor logic operation by a sampling circuit, processing and outputting a random number for the first time, inputting a data source output by the sampling circuit into an MSB shifting register circuit and an LSB shifting register circuit, and controlling the shifting operation by a shifting register control circuit connected with the MSB shifting register circuit and the LSB shifting register circuit; outputting the result data controlled by a shifting register through the MSB shifting register circuit and the LSB shifting register circuit, entering a combination circuit, carrying out xor logic operation, and finally outputting the random number. According to the invention, the structure is simple, a circuit can be expanded conveniently, the generation rate of the random number is high, the reuse of an integrated circuit can be supported, and the realization is easy.