Connector and counter-pull device for detecting effective prestress under anchor of grouted steel strand

The utility model discloses a connector and a counter-pull device for detecting effective pre-stress of a grouted steel strand under an anchor, and aims to achieve the technical effects of connecting extended steel strands and realizing counter-pull. In order to solve the technical problem, the utility model adopts the following scheme: the connector for detecting the effective prestress under the anchor of the grouted steel strand comprises a connector outer sealing body and a connecting block which is arranged in the connector outer sealing body and can move along the axis direction of the connector outer sealing body; the connecting block is provided with a left clamping part for clamping the prestressed steel strand outside the anchorage device clamping piece; the connecting block is provided with a right clamping part for clamping the extended steel strand; the left side of the connector outer sealing body is provided with an anchor contact face abutting against the outer side face of an anchorage device