The invention discloses a device for continuously measuring the flow rate of steel melt near surface thereof, wherein the device comprises a flow rate detecting rod (18) and a deflection means (B) for the flow rate detecting rod, wherein the flow rate detecting rod (18) comprises a refractory material tube at one end and a stainless steel rod at the other end, and the stainless steel rod is fittedly connected with the refractory material tube. The flow rate detecting rod (18) comprises a refractory material of a single compound or a composite of two or more compounds. The flow rate detecting rod (18) has a length of 10-100cm and a diameter of 5-50mm. The deflection means (B) for the flow rate detecting rod comprises a fastening screw (27) for the flow rate detecting rod, and the flow rate detecting rod (18) is fixed to the deflection means (B) for the flow rate detecting rod by using the fastening screw (27) for the flow rate detecting rod. The present invention also provides a method for continuously measuring the flow rate of steel melt near surface thereof, comprising the steps of determining the barycenter, the rotational pivot and the acting point of an impact force on the flow rate detecting rod; calculating the distance between the rotational pivot and the barycenter, as well as the distance between the rotational pivot and the acting point of the impact force; measuring the gravity value of the flow rate detecting rod; inserting the refractory flow rate detecting rod into the steel melt to obtain a rotational angle and an insertion depth; and consequently calculating the continuous variation of the flow rate of the steel melt.