The invention discloses a novel light composite partition board and further discloses a production technology of the novel light composite partition board. The novel light composite partition board comprises face plates and a core material between the two face plates. Tenons and notches are formed in the two mounting side faces of the partition board correspondingly, wherein the tenons and the notches are matched in shape. Fixing grooves parallel to the tenons are formed in the two edges of each side face of the corresponding tenon, and through grooves are formed in the core material. The faceplates comprise raw materials of industrial and agricultural solid waste, heat-insulating padding, inorganic environment-friendly adhesives, polymer emulsions and water, and the core material comprises raw materials of cement, polyethylene foam particles, an inorganic environment-friendly adhesive and water. The production technology of the novel light composite partition board comprises the working procedures of face plate and core material raw material preparation, forming, solidification, demolding, cutting and curing. The production technology is simple, rapidness and environmental friendliness are achieved, the integrality of the partition board is good, the fireproof, heat-insulation, dampproof and waterproof properties are achieved, the hanging capacity is high, the light and economical effects are achieved, the sound insulation effect is good, the used raw materials of the partition board do not contain substances which are harmful to human bodies, and accordingly the safe andsecure effects are achieved.