Water heating blanket host fixing device connected with mattress

The utility model relates to a water heating blanket host fixing device connected with a mattress, which comprises a lower mattress and an upper mattress stacked on the lower mattress. A connected water heating blanket main machine fixing device is arranged between the joint parts of the lower mattress and the upper mattress; the water heating blanket main machine fixing device comprises a connecting protruding plate extending and protruding inwards, a fixing nail, a supporting plate, a triangular reinforcing rib and a boss extending and protruding outwards. The connecting protruding plate extends inwards and is transversely inserted into a gap between the lower mattress body and the upper mattress body, the fixing nails are inserted into the through fixing holes in the connecting protruding plate in a penetrating mode, extend downwards, protrude and are nailed into wood on the upper end face of the lower mattress body to be fixed, and the upper mattress body is overlaid on the lower mattress body. The utilit