The invention provides an arc heating mixing melting brazing method for aluminum-titanium dissimilar metal connection and relates to a method for dissimilar metal connection. The arc heating mixing melting brazing method for the aluminum-titanium dissimilar metal connection solves the problem that an existing welding method of the dissimilar metal of aluminum and titanium and alloy of aluminum and titanium cannot have low cost and avoid extension of intermetallic compound simultaneously. The method includes: 1, clearing a test piece to be welded; 2, positioning a workpiece; 3, leading in argon; 4, clamping a mixing head; 5, starting a device to start welding; and 6, cooling, namely, arc heating mixing melting brazing for the aluminum-titanium dissimilar metal connection is completed. The arc heating mixing melting brazing method for the aluminum-titanium dissimilar metal connection has the advantages of being simple in device, greatly reducing cost, improving efficiency, being capable of refining grains by using the mixing head for pressing and mixing, improving weld joint structure properties, promoting weld joint forming, being capable of effectively removing intermetallic compound films, and improving weld joint forming and properties. The arc heating mixing melting brazing method for the aluminum-titanium dissimilar metal connection can be used for welding of the dissimilar metal of aluminum and titanium and alloy of aluminum and titanium.