Built-in joint of tubular bus bar and connection structure of joint and conductor

The invention belongs to transmission equipment, relating to a built-in joint of a tubular bus bar for tubular bus bar connection and a connection structure of a joint and a conductor. The built-in joint thereof comprises a lower connection block with a semiterete outside surface and an upper connection block with a semiterete outside surface, the upper connection block is provided with a plurality of threaded holes penetrating through the inner side and the outer side, screws are screwed in the threaded holes, and the lower ends of the screws extend out of the threaded holes and resist an inside plane of the lower connection block. The invention has simple structure and convenient installation, because the upper connection block and the lower connection block as transition conductors are inserted into an inner cavity of the tubular conductor, the outside surface of the tubular conductor does not have a projection part and the space occupation of the joint is reduced; and because the upper connection block an