The invention relates to an integrated system for polyacrylamide dissolution, curing and dosing provided with a heating device and a using method thereof. The integrated system for polyacrylamide dissolution, curing and dosing provided with the heating device comprises dosing points, a PLC control system and a dissolution box used for containing medicament. A water inlet pneumatic value used for adding water into the dissolution box is arranged above the dissolution box. A heater used for heating liquid in the dissolution box is arranged in the dissolution box. The medicament in the dissolution box is communicated with the dosing points through a channel arranged to be connected with a water flowmeter for dilution water. The heater, the water inlet pneumatic valve of the dissolution box and the water flowmeter for the dilution water are all connected with the PLC control system. The integrated system for polyacrylamide dissolution, curing and dosing provided with the heating device and the using method thereof have the advantages that it is guaranteed that the temperature of the solution can be controlled in the range of 30 to 35 DEG C when the polyacrylamide is dissolved and cured, the molecular chain of the polyacrylamide is damaged, and the flocculation reaction effect can also be strengthened; an integrated design is adopted in the integrated system for polyacrylamide dissolution, curing and dosing provided with the heating device, the integrated system for polyacrylamide dissolution, curing and dosing provided with the heating device is complete equipment and is provided with the PLC control system by itself, and wide adaptability is achieved.