Disclosed is a grouping method for secondary utilized lead-acid storage batteries. The grouping method comprises the following steps of (1) performing classification on the secondary utilized lead-acid storage batteries; (2) performing grouping on the secondary utilized lead-acid storage batteries and nominal batteries in the same group, and measuring the capacity, voltage and internal resistance of each single battery in the grouped secondary utilized lead-acid storage batteries and the nominal battery; (3) if all the conditions can be satisfied as follows: the proportion deviation of the capacity of the secondary utilized lead-acid storage batteries and the capacity of the nominal batteries is not greater than 10%, the proportion deviation of the voltage of the secondary utilized lead-acid storage batteries and the voltage of the nominal batteries is not greater than 2%, and the proportion deviation of the internal resistance of the secondary utilized lead-acid storage batteries and the internal resistance of the nominal batteries is not greater than 20%, removing the nominal batteries from the group, and taking the secondary utilized lead-acid storage batteries as the final grouped batteries; and (4) removing the unqualified secondary utilized lead-acid storage batteries until all secondary utilized lead-acid storage batteries can be qualified. By adoption of the grouping method, the maximum utilization rate of the lead-acid storage batteries is realized, and the use cost of the energy storage battery is lowered.