Plate splicing mortise and tenon joint structure and plate connecting structure

The utility model discloses a panel splicing tenon-and-mortise structure and panel connecting structure, including the integratedly formed clamping piece, the clamping piece includes integratedly formed upper clamping plate, lower clamping plate, spacing structure and two connecting plate, the one side edge of upper clamping plate and lower clamping plate is connected through the connecting plate, spacing structure is provided on the upper clamping plate, and the two connecting plates are connected through the connecting plate. The limiting structure comprises a plurality of limiting pieces, the limiting pieces are sequentially staggered and bent towards the inner side and the outer side to form limiting inserting seams, and the limiting pieces are bent towards the lower portion of the upper clamping plate. The limiting pieces which are sequentially staggered and bent inwards and outwards are used for forming the limiting insertion seams, the limiting insertion seams and the connecting insertion plates are co