The utility model provides a maintenance platform truck, including running gear, its characterized in that: still include the maintenance unit, this maintenance unit sets up on running gear, the maintenance unit is including compressing tightly unit, support element, lock water unit and water supply unit, compress tightly the unit setting on support element, the setting of lock water unit is on compressing tightly the unit, the setting of water supply unit is compressing tightly the water supply of unit upside and twin lock water unit. The utility model discloses simple structure, reasonable in design, the water consumption is few, and is with low costs.