The utility model discloses a logic single channel calculation method and the device, pertaining to the field of the network administration. The channel number is buffered in the FIFO and the RAM's address scope is distributed; the channel number is read from FIFO and decoded to the address and sent to RAM; when the calculation needs to be read, reading out the calculation and the data in RAM shall be written as zero. Such data are correspondent to the channel number; when the calculation is not read, the data corresponding to the address in RAM shall be accumulated, so as to obtain and storenew calculated data. The device includes a storage module, a de-coding module, a accumulating module and a reading-out and zero clearing module. The storage module stores the channel number and calculates the data; the de-coding module is used to decode the channel number; the accumulating module is used to calculate the accumulation; the reading-out and zero clearing module is used to read out and clear the calculated data. The utility model further improves the logistic calculation of the channels.