A hollow groove pipe structure is disclosed and includes a hollow groove pipe, first fixing sliding members, second fixing sliding members, and fixing members. The hollow groove pipe has a first surface, a second surface, a third surface, and a fourth surface for surrounding a hollow space. At least two opposite surfaces have grooves, and the bottoms of the grooves are greater (wider) than the opening and provided with trough holes. The plates having a plurality of protruding portions can be clamped in the grooves. The first and second fixing sliding members having protruding portions surround and clamp the plates with the space between the two through holes of the grooves, such that the fixing members pass through the holes of the first fixing sliding member, and the holes of the groove the holes of the second fixing sliding member fix and combine the plates into a whole.