The utility model discloses a discharge connection device including a discharge post. One end of the discharge post is provided with a curved-face contact end while the other end of the discharge post is used for being connected with one of a to-be-discharged module and a discharge device electrically. The discharge connection device also includes a wiring terminal used for being connected with the other one of the to-be-discharged module and the discharge device electrically. The wiring terminal is provided with a curved-face contact groove connected with the curved-face contact end electrically. According to the utility model, flat and smooth curved face connection is adopted since flat and smooth curved faces are not easy to produce current and therefore uniform in discharge and contact area of the curved faces is comparatively large. By adopting the discharge connection device, possibilities that direct contact may cause electric shock in a device discharge connection process since charges remain in a super capacitor are eliminated. At the same time, a problem of connection wire corrosion affecting service lifetime is also avoided. The utility model also discloses a discharge system provided with the above discharge connection device.