The invention discloses a multi-functional mechanical clamping device which comprises a base, a
stepper motor, a thin-wall sealed cross
roller bearing, a rotating body, a driving shaft, a key pin, a
harmonic producer, an angular
thrust bearing, a steel wheel, a flexible wheel, a
gasket, a cover plate, a connecting key, a vertical column, a first
hydraulic cylinder, a first hydraulic rod, a rotating arm base, a guiding rod front bracket, a guiding rod rear bracket, a first guiding rod, a
hydraulic cylinder support, a second
hydraulic cylinder, a second hydraulic rod, a clamping head, a clamping suction cup, a guiding sleeve, a second guiding rod and a
rotating disc. The multi-functional mechanical clamping device is compact in structure and convenient to use; in the working process of the multi-functional mechanical clamping device, the multi-angle clamping operation can be stably achieved; the multi-functional mechanical clamping device is applicable to various working
modes; the universality, the strength, the stability and the precision are high; the manpower use is effectively reduced; the economic benefit and the social benefit are good; and the multi-functional mechanical clamping device is suitable for popularization and utilization.