Preparation method of non-ionic acrylamide flocculating agent

The invention belongs to the technical field of non-ionic acrylamide flocculating agent, and discloses a preparation method of a non-ionic acrylamide flocculating agent. The preparation method comprises following steps: 1, a certain amount of corn irradiated starch is weighed, and is subjected to vacuum drying for further processing; 2, a certain amount of acrylamide crystal is weighed, and is delivered into a container with the corn irradiated starch, and an obtained mixture is stirred to be uniform; 3, a certain amount of ammonium persulfate crystal is weighed, and is delivered into the container, and an obtained mixed material is stirred to be uniform; 4, the container is delivered into a microwave heater for heating, after primary heating, an obtained product is taken out from the microwave heater, is cooled to room temperature, is stirred to be uniform, then is subjected to heating for 10s for three times, is cooled to room temperature, and is stirred to be uniform, wherein the time of primary heating is