The invention provides an inner guide gapless mechanical matrix, which meets the dynamic three-dimensional transformation effect. The mechanical matrix comprises a bottom plate. The bottom plate is provided with a plurality of mechanical matrix units. Each mechanical matrix unit comprises a power and motion transmission mechanism. The bottom plate is provided with a motor bracket. The motor bracket is connected with a supporting rod by a screw. A motor is fixed on the motor bracket by a screw. A lower synchronous belt wheel is directly locked on a motor shaft by a bolt. A small pin shaft is connected with the supporting rod by a screw. An upper synchronous belt wheel is directly sleeved at the shaft end of the small pin shaft. The synchronous belt wheels are connected with a square tube by screws. The inner guide gapless mechanical matrix can be changed into various static three-dimensional topography landforms under the control of a control system and can also carry out three-dimensional transformation of dynamic graphs to form various vivid three-dimensional dynamic images so as to form impressive visual effect.