The invention provides a multi-unit connecting rod driving three-activity sliding loading robot. The multi-unit connecting rod driving three-activity sliding loading robot comprises a multi-unit connecting rod driving mechanism, a movable arm lifting mechanism, a bucket control mechanism and the like. Driving of a plurality of small-power motors and large-power and high-torque power output are achieved through the multi-unit connecting rod driving mechanism under the control of a computer, and the high-load operation power requirements of the sliding loading robot are met. Based on the Pascal principle, a hydraulic element is introduced into the movable arm lifting mechanism, the intra-cylinder pressure is equal, the problem that two driving chains of an existing controllable sliding loading mechanism lifting movable arm are unbalanced in stress is effectively solved, and the bearing stability is improved. The sliding loading robot not only has the characteristics of being high in transmission efficiency, response speed and moving precision, good in controllability and the like of an existing controllable sliding loading mechanism, but also has better bearing performance and better anti-vibration performance by introducing the multi-unit connecting rod driving mechanism and the hydraulic element; an overload protection function is easy to achieve; and the multi-unit connecting rod driving mechanism and the hydraulic element are very suitable for manufacturing large-size, medium-size and small-size sliding loading robots.