Starch-based industrial waste residue composite material Portland cement retarder

The invention provides a starch-based industrial waste residue composite material Portland cement retarder which comprises a solution A and a solution B. The solution A comprises powder A and water, the solution B comprises powder B and water, and the starch content in the powder A is 70-80 wt.%; the powder B is one or more of fly ash, granulated blast furnace slag, silica fume, limestone powder, steel slag powder, phosphorus slag powder and zeolite powder. According to the present invention, the cement setting time and the penetration resistance can be significantly improved, the characteristics of easy obtaining, low price, environmental protection and the like are realized, the physical and chemical composite principle is adopted so that the adaptability with various types of cement and water reducing agents is strong, the later mechanical property of the cement is not significantly affected, and the generation amount of the main product of the cement hydration is not affected, and the total porosity of th