Improved electricity demonstration board

The utility model discloses an improved electricity demonstration board. The utility model is characterized in that the improved electricity demonstration board comprises an iron demonstration board and a fixed back board, wherein, the fixed back board is provided with a plurality of through holes, a magnetic block is stuck at the position corresponding to the through holes, the back side of the iron demonstration board is absorbed on the magnetic block, and the iron demonstration board is fixed and connected into a whole with the fixed back board. The improved electricity demonstration board also comprises an iron L-shaped object shelf, a plurality of magnetic blocks are fixed and connected at the back side at one side of the iron L-shaped object shelf, the magnetic blocks are absorbed on the front surface of the iron demonstration board, and the iron demonstration board is fixed and connected with the iron L-shaped object shelf. Compared with the prior art, as long as the circuit elements are iron circuit e