The invention relates to an on-site wiring connector. A wire insertion channel of the on-site wiring connector is obliquely arranged in a connector shell, thus the length of the wire insertion channel in the connector shell can be increased, the pressing matching length of a wire pressing structure and a wire core is increased, thus the fixation strength of the wire core by the wire pressing structure is enhanced, matching of the wire core and a conducting strip is ensured to be more reliable, after the wire core of a cable is fixed in the connector shell by the wire pressing structure, a direction of insertion in the connector is an obtuse angle, when the cable is stressed, the bending deformation degree of a joint of the cable and the connector shell can be decreased, and the cable in the position is prevented from too large deformation and damage; and at the same time, a wire blocking structure arranged at the upper side of the front end of the wire insertion channel can perform stop and limit the wire core, thereby facilitating operation.