The pump chain housing can be used in portable emergency drainage equipment, especially when equipment durability and protection need to be improved. In this application, the pump chain housing can effectively protect the chain of the drainage pump from external environmental factors such as sediment, dust, sewage, etc., which are usually unavoidable in emergency drainage. The shell can ensure that the chain runs smoothly in complex environments, avoiding chain wear or jamming caused by the entry of pollutants, thereby improving the reliability of drainage equipment. In addition, the protective effect of the housing is not limited to the chain, but can also prevent external physical impacts, corrosive liquids, and other damage to the pump body. Especially in the use of emergency drainage equipment, this additional protection is particularly important because these devices usually need to be quickly put into use in harsh environments and can effectively resist physical damage in the environment, greatly improving the efficiency and service life of the equipment.