HDQ large-scale hydroelectrolysis hydrogen production device series: suitable for large-scale hydrogen production station, hydrogen production is large, high purity, hydrogen purity after purification reaches more than 99.999%, oxygen purity reaches more than 99.5%, a single set of hydrogen production up to 1500Nm³/h, can be combined into multiple sets of parallel operation. The electrolytic cell adopts bipolar press filter structure, and the insulation sealing gasket has strong sealing performance. The gas-liquid processor is a frame combined structure, the process is simple, easy to install, operate and maintain. Automatic microcomputer control, high degree of automation, remote control management, easy to operate, safe and reliable.