Cantilever crane clamping control method and device and operation machine

The invention relates to the technical field of operation machinery, and provides a boom clamping control method, a boom clamping control device and operation machinery. The arm support clamping control method comprises the following steps that in the process that a second arm section is in a retracted state and a first arm section is unfolded, when the actual unfolding angle of the first arm section is smaller than a first preset angle, the actual tightening pressure of a driving oil cylinder of the second arm section is detected in real time; and in the state that the actual tightening pressure of the driving oil cylinder of the second arm section is smaller than the preset pressure, the actual tightening pressure of the driving oil cylinder of the second arm section is increased to the preset pressure, so that the driving oil cylinder of the second arm section drives the second arm section to be tightened to the lower side of the first arm section. Therefore, the phenomena that the second arm section falls