The single-chip microcomputer can control many aspects through a digital operation. In the division operation of a single-chip microcomputer, the method of subtracting while shifting (try to calculate) is generally adopted, so the time consumed by this operation cannot meet the requirements of fast operation. This is mainly due to the fact that the divisor needs to move to the left and enter the remainder area in turn, after the intermediate remainder is generated, it is compared with the divisor, which wastes a lot of time. To solve this problem, we can use the fast scanning method to improve, that is, to move in many bits each time, and then use the dichotomy to get the value of the quotient.