The invention relates to an integrated maintenance instrument for a storage battery and a method for preventing deterioration of the storage battery in a storage and transportation period. The maintenance instrument comprises a central control and computation unit, a data collection / output mode selection unit, a desulfurization / charging mode selection unit, a pulse / charging generation unit and an output unit, wherein the central control and computation unit and the data collection / output mode selection unit are respectively connected with a data collection unit. The central control and computation unit sends out a corresponding command to control the data collection unit or the output unit to work, thereby completing data collection of the storage battery, balanced charging of the storage battery or pulsed desulfurization of the storage battery. By adopting the method, the influence of self-discharge of the battery can be effectively overcome, the deterioration of the battery in the storage and transportation period can be effectively prevented, and the manual intervention is not required in the whole process; through the three-stage combined maintenance way of detection protection, balanced charging and pulsed desulfurization adopted by the integrated maintenance instrument for the storage battery, the deterioration of the battery can be effectively eliminated, the lost battery performances are restored and the battery can be always kept in an optimal state in the storage and transportation period.