DPI adjustment control method and device of ink-jet printer, computer readable medium and equipment

The embodiment of the invention provides a DPI adjustment control method and device of an ink-jet printer, a computer readable medium and equipment. The DPI adjustment control method of the ink-jet printer comprises the steps that according to a currently received encoder synchronization signal, the current average sliding period duration of a preset number of continuous encoder synchronization signal periods including the current encoder synchronization signal period is determined, and the encoder synchronization signal is a jet printing trigger signal; according to the proportion of the current DPI value to the target DPI value and the current moving average period duration, the jet printing period duration is determined; and reading to-be-jet-printed data according to the current moving average period duration, and carrying out jet printing on the to-be-jet-printed data according to the jet printing period duration. According to the technical scheme of the embodiment of the invention, the jet printing effe