The invention relates to a conductor electrical connection device comprising a contact finger installing sleeve which extends along a left-and-right direction. The contact finger installing sleeve is provided with a plugging hole segment which sleeves the corresponding end part of a plugging conductor under conductive connection in a clearance way. The contact finger installing sleeve is provided with a conductive contact finger structure. The conductive contact finger structure is provided with an elastic contact finger part which stretches to the plugging hole segment in a suspension way and is arranged in a way of inwardly protruding out of the internal hole wall of the plugging hole segment so as to be conductively contacted with the corresponding plugging conductor. The elastic contact finger part can deform in the radial direction of the contact finger installing sleeve under the abutting effect of the plugging conductor so that the radial position of the plugging conductor in the contact finger installing sleeve can be adjusted, effective conductive contact of the electrical connection device and the plugging conductor can be realized through radial deformation of the elastic contact finger part even deviation exists between the original installing position of the plugging conductor and the design position, and thus the assembling accuracy requirement for the plugging conductor can be reduced and the assembling efficiency can be enhanced.