Spring self-switching type Y-shaped joint

The invention relates to a spring self-switched Y-shaped joint which is characterized in that: the joint comprises a joint body, wherein, one side of the joint body is provided with a production channel and a test channel in a communication way and the other side thereof is provided with an electric pump oil-pumping channel; the upper part of the electric pump oil-pumping channel is provided withan oblique oil-pumping channel communicated with the production channel, a slideway hole is transversally arranged between the test channel and the electric pump oil-pumping channel, one end of the slideway hole, which is close to the electric pump oil-pumping channel, is fixed to be connected with an end cover and a pressure-transmitting hole is arranged at the center of the end cover; a sealingsliding block, the head of which faces the test channel is arranged in the slideway hole; an extension spring which is corresponding to the head shape of the cylindrical sealing sliding block is arranged between the end cover and the sealing sliding block; a sealing slot is arranged on the pipe wall of the test channel, and screw threads which connect pipelines are respectively arranged at the upper end part of the production channel, the test channel and the lower end part of the electric pump oil-pumping channel. The joint has simple structure and convenient operation, and can be widely used in an oil drilling system.