Control method of hydraulic drive compression device

The invention discloses a hydraulic drive compression device control method which comprises the following steps: S1, determining an initial position of a piston rod of a bidirectional hydraulic cylinder, and determining a first travel switch and a second travel switch; s2, the duration of the first forward stroke motion of the piston rod of the bidirectional hydraulic cylinder is set to be ta, the duration of the first return stroke motion of the piston rod is set to be tb, and ta is larger than tb; s3, starting from the second forward stroke motion, the duration of the nth forward stroke motion is the sum of the duration of the (n-1) th return stroke motion and the increment time delta a, if the piston rod triggers the second stroke switch in the (n-1) th forward stroke motion, delta a is negative, and otherwise, delta a is positive; from the second return stroke motion, the duration of the n < th > return stroke motion is the sum of the duration of the n < th > forward stroke motion and the increment time d