The invention discloses a dual liquid pump liquid cooling radiator and a liquid cooling heat dissipation device. The dual liquid pump liquid cooling radiator includes two liquid boxes and a plurality of radiator pipe sets arranged side by side between the two liquid boxes. The interior of one liquid box is divided into a hot liquid chamber and a cold liquid chamber by an air heat insulation space, and a first liquid pump is installed therein. The interior of the other liquid box is divided into a hot liquid chamber and a cold liquid chamber by a liquid barrier, and a second liquid pump is installed therein.