The present invention relates to the field of networking smoke detection, and in particular to a bus control implementation method. The method comprises that: whether the bus protocol is a two-level bus protocol or a three-level bus protocol is determined; relevant parameters are configured; an enable side of a comparator is started; the bus voltage is compared with the threshold voltage; whether the receiving mode is an up mode or a down mode is determined; burr filtering is carried out; and finally a bus communication module carries out communication processing. According to the method disclosed by the present invention, both the two-level bus protocol and the three-level bus protocol can be solved, and burrs with different widths can be filtered out.