The invention discloses an austenite welding member for a pack-basket heat radiator and a manufacturing method of the austenite welding member. The austenite welding member comprises two vertical communicating tubes and a plurality of straight horizontal tubes distributed on the same vertical plane and further comprises a plurality of bent horizontal tubes not arranged on the same vertical plane as the straight horizontal tubes. The two kinds of horizontal tubes are respectively connected with the two vertical communicating tubes, protruded-inwards annular turnups of the vertical communicating tube are divided into two rows on the tube walls of the vertical communicating tubes, and an included angle is formed between the two rows of annular turnups. The straight horizontal tubes and the bent horizontal tubes are made of thin-wall stainless steel tubes, and the two kinds of horizontal tubes are in through connection with the vertical communicating tubes and are respectively inserted into the two rows of annular turnups of the vertical communicating tubes; the tube walls are tightly attached to each other, the end faces are aligned to each other, and annular welding joints are formed through end face welding. The vertical communicating tubes are made of strip-shaped stainless steel thin plates, a pair of protruded-outwards strip-shaped turnups are arranged at the closed position where the vertical communicating tubes are bent into a close-section shape in the length direction, and the upper end faces of the strip-shaped turnups are welded into strip-shaped welding joints.