The invention discloses a process method for producing a low-tin-lead-calcium alloy by utilizing a waste grid mesh of a waste lead-acid storage battery, and belongs to the field of comprehensive recycling of waste lead-acid storage batteries. The waste grid mesh is molten at a low temperature in a smelting cooker, wherein the melting temperature is controlled to be 350 to 500 DEG C; removing ash residue, and adding a copper removing agent to remove copper to obtain a copper-removed lead solution; and rising the temperature of the copper-removed lead solution to 580 to 650 DEG C, adding an antimony-arsenic removing and tin maintaining agent to remove antimony and arsenic to obtain a tin-containing lead solution, performing purifying treatment on the tin-containing lead solution, and then, preparing the low-tin-lead-calcium alloy. The indexes, such as tensile strength, density, hardness and corrosion resistance, of the produced low-tin-lead-calcium alloy are basically consistent with those of a lead-calcium alloy which is prepared by primary electrolytic lead; and using requirements of a lead-calcium alloy of a storage battery are met. The process method for producing the low-tin-lead-calcium alloy by utilizing the waste grid mesh of the waste lead-acid storage battery has the advantages that the process is simple, convenient to operate and high in production efficiency; the valuable metal tin in the waste grid mesh is effectively utilized; the production cost of lead alloy preparation is reduced; meanwhile, smoke and odour do not exist in an antimony and arsenic reacting process; and a working environment is good.