The present disclosure relates to aft XIU-accumulating register, aft XIU-accumulating register circuit, and an electronic device. The XIU-accumulating register includes a first accumulating unit and a second accumulating unit. The first accumulating unit includes a first adder and a first register; the first adder is configured to accumulate fractional bit data of an accumulated variable, and the first register is configured to store an accumulated result of the fractional bit data and carry bit data of the accumulated result of the fractional bit data. The second accumulating unit includes a second adder and a second register; the second adder is configured to accumulate integer bit data of the accumulated variable, and the second register is configured to store an accumulated result of the integer bit data.
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