Novel building block, building block splicing structure and building block toy

The utility model relates to a novel building block, a building block splicing structure and a building block toy. The novel building block, the building block splicing structure and the building block toy are ingenious in structural design and convenient to splice, when a plurality of building blocks are spliced, the T-shaped tenon of one building block penetrates through the first through hole of the other building block and is inserted into the lock groove of the other building block, then the T-shaped tenon rotates towards the lock head limiting block with the axis of the T-shaped tenon as the circle center, and then the building blocks are spliced. The two ends of the T-shaped tenon abut against the two lock head limiting blocks respectively, and the two ends of the T-shaped tenon and the notch of the first through hole are arranged in a staggered mode, so that two adjacent building blocks can be spliced together, and assembling is convenient. In the splicing and connecting process, interference fit does