The invention discloses a charging gun with a heat dissipation function. The charging gun comprises a gun head shell, a gun body shell, a DC terminal, a charging cable and a cooling pipe, wherein the DC terminal is fixed on the gun head shell, and the charging cable and the cooling pipe are connected with the DC terminal; the DC terminal is provided with a cooling flow channel which communicates with the cooling pipe, and cooling mediums flow in the cooling pipe and the cooling flow channel. According to the charging gun with the heat dissipation function, the cooling flow channel and the cooling pipe are arranged in the charging gun, so that heat during large current charging of the charging gun is quickly dissipated through the continuously flowing cooling mediums, and breakdown and other potential safety hazard problems resulted from excessive temperature caused by fast charging of the charging gun are effectively solved.