The invention discloses a zinc hydrometallurgical process. The process comprises the following steps of: directly performing fluidized roasting on zinc concentrate so as to obtain hot roasted sand; introducing a gas mixture of sulfur dioxide and oxygen so as to perform heat preservation for the hot roasted sand; after heat preservation, performing weak-acid leaching for a moment so as to obtain zinc sulfate leaching liquid; purifying the zinc sulfate leaching liquid; and performing electrodeposition and electrolysis on the purified zinc sulfate leaching liquid. According to the zinc hydrometallurgical process disclosed by the invention, through the heat preservation on the hot roasted sand, the problem of zinc ferrite is solved; through weak-acid leaching for a moment, zinc in the heat-preserving roasted sand can be effectively extracted; sedimenting iron slag is not generated during leaching; leaching residues do not need to be treated by a high-temperature hot acid leaching and rotary-kiln reduction volatilization. The production cost of the zinc hydrometallurgical process is effectively reduced; the leaching condition of the zinc hydrometallurgical process is improved; the comprehensive reclaiming rate of zinc is increased; the harm of zinc smelting to the environment is reduced; the source emission reduction of the zinc hydrometallurgical process is realized.