Disassembling and assembling method for heavy water pump

The invention discloses a disassembling and assembling method for a heavy water pump. The disassembling and assembling method comprises the steps that one end of a hoisting hoist is hung on a horizontal cross beam through a sliding wheel assembly; the other end of the hoisting hoist is connected with hanging pieces of hoisting rings hung on the two sides of a water pump; a first bolt for connecting a motor located on the water pump with a base is disassembled; the hoisting hoist is pulled to hoist the water pump so as to enable the motor to be separated from the base; and universal wheels arematched with the sliding wheel assembly so as to move the motor to a designated position. According to the disassembling and assembling method for the heavy water pump, the hoisting hoist is used forhanging the hanging pieces connected with the heavy water pump to easily move the water pump, and the position of a drainage pump is adjusted through cooperation of the universal wheels and the sliding wheel assembly, so that