The invention provides a kelp culture jig and float integrated jig for improving the culture density, which belongs to the technical field of kelp culture, and includes a device main body, a protrusion, a fixing hole, an insertion groove, a through groove, an insertion groove, an operation panel, a handle, a spring, Closing plate, device auxiliary body, groove, float, spring coil, connecting plate, fixing nail, threaded protrusion, stirring plate and nut, the upper and lower ends of the left side of the main body of the device are fixedly connected with protrusions, and the right side of the device auxiliary body The upper and lower ends of the surface are nested with grooves, and the protrusions and grooves are snap-fitted. The left surface of the main body of the device and the right surface of the auxiliary body of the device are both nested with fixing holes. The front surface of the main body of the device and the auxiliary body of the device Embedding grooves are provided through each of them, one side surface of the embedding groove is nested with a through groove, and the through groove and the fixing hole are arranged through, and the outer surface of the main body of the device and the outer surface of the auxiliary body of the device are nested with an insertion groove.