Plastic pipeline hot melting test device and plastic pipeline hot melting test method

The invention discloses a plastic pipeline hot melting test device, and relates to the technical field of pipeline hot melting, the plastic pipeline hot melting test device comprises a universal testing machine, the universal testing machine is provided with a first compression clamp and a second compression clamp which are oppositely arranged, and the first compression clamp and the second compression clamp are respectively used for clamping a section of plastic pipeline; the heating plate is used for heating the end parts of the two sections of plastic pipelines; the self-balancing mechanism is used for balancing the heating plate and comprises a stand column, a sliding block in sliding fit with the stand column and a balancing weight used for balancing the sliding block, and the sliding block and the balancing weight are connected through a fixed pulley and a traction rope fixed to the stand column; under the action of the traction rope, the sliding block slides along the stand column until the sliding blo