The invention relates to a guitar, in particular to a guitar realizing convenient tuning and a using method of the guitar realizing convenient tuning. The guitar realizing convenient tuning comprises a resonance box, a guitar neck, N strings, string screwing columns, N fastening turbines used for fixing the string screwing columns, N adjusting turbines used for driving the string screwing columns to rotate, a rotating sleeve rod used for driving the fastening turbines and the adjusting turbines to rotate, a rotating rod used for driving the rotating sleeve rod to rotate, a stepping motor, a fixing device used for fixing the rotating sleeve rod to prevent the rotating sleeve rod from rotating, a toggle switch used for moving the rotating sleeve rod, a connecting rod used for connecting the toggle switch and the rotating sleeve rod, a liquid crystal display screen, a frequency increasing button, a frequency decreasing button, a control circuit and a guitar head. For the guitar realizing convenient tuning, tone tuning can be accurately realized by using one stepping motor, the default expected value can be automatically generated, the tone tuning expected value can be adjusted through the buttons and a fine tuning knob, and through the fixing device, the tightness degree of the strings is constant permanently after tuning is completed.