The invention relates to a solar photovoltaic junction box assembly, which comprises a junction box body, an external cable and a connector, wherein the junction box body is provided with a clamping structure; the external cable is connected to a connection terminal in the junction box body; the connector is connected to the external cable and is matched with the clamping structure to be fixed on the junction box body; when the connector is fixed on the junction box body, a jack of the connector is shielded by the junction box body. According to the solar photovoltaic junction box assembly, the connector is fixed on the junction box body and the jack of the connector is shielded by the junction box body, so that a dustproof effect is played, the external pollution is avoided, and furthermore, the connector is fixed, the cable is restrained accordingly, so that the ribbons for binding the cable are reduced or omitted, and thus the cable fixing work is reduced and the fixing cost is reduced.