The invention discloses a dampproof 
solid wood floor provided with a core plate proper in tightness degree. The floor comprises a 
surface plate, the core plate and a back plate, wherein the core plate is formed by series connection of multiple wood laths through at least two connecting ropes arranged in the long-side direction of the core plate. The method for manufacturing the floor comprises the steps of selecting two wood laths in the same size, conducting 
vacuum drying on the wood laths at a temperature 
ranging from 40 DEG C to 60 DEG C, and controlling the 
moisture content of the wood laths to be 5-8%; placing the dried wood laths in order, 
cutting the wood laths with a 
rope threading 
machine to obtain grooves, and pressing the connecting ropes into the grooves during 
cutting; fixing the 
surface plate and the back plate to the upper side and lower side of the manufactured core plate through adhesives respectively to obtain the 
solid wood floor, and applying dampproof oil to the four sides and bottom surface of the manufactured 
solid wood floor. Through the cooperation of a grooving device, a 
rope pressing device and a press-aligning plate, mechanical 
rope threading is achieved, grooving and rope threading are achieved synchronously, the 
size ratio of the grooves to the connecting ropes is proper, the tightness degree of the manufactured core plate is proper, certain redundancy is available under a damp condition, and 
moisture resistance is realized.