Crane and control method thereof

The present invention discloses a crane control method thereof. Disclosed crane boom comprising hoisting mechanism, telescoping control means, the control means winch, the telescopic boom speed detecting means, speed detecting means and the retractable hook controller; telescopic speed detecting means for detecting the speed of the telescopic boom of the boom end ; retractable speed detecting means for detecting speed of the retractable hook of the hook; controller transmits a control command to at least one of said telescoping winch control means and control means according to a predetermined strategy; the telescoping control means according to the control command adjusting the speed of the telescopic boom end; the winch control means adjusting the speed control instruction to the winding mechanism of the retractable cord. When using the crane lifting operation, depending on the relationship between the speed of the retractable hook end of the telescopic boom speed, the control operation of the rope retractable telescopic action and / or the end of the boom hoisting mechanism, coordination arm moves up and down with the expansion and contraction of the hook frame.