The present disclosure provides a mount connecting structure for a motorcycle engine, and belongs to the technical field of motorcycles. The mount connecting structure for a motorcycle engine includes a fixed arm located on a frame, a buffer rubber wheel, a buffer connecting arm, a supporting arm and a connecting rod, the buffer rubber wheel sleeves a periphery of the connecting rod and is embedded in an end portion of the fixed arm, the engine is connected to the connecting rod, one end of the buffer connecting arm is hinged to the connecting rod, the connecting rod is arranged transversely, one end of the supporting arm is hinged to the fixed arm, the other end of the buffer connecting arm is hinged to the other end of the supporting arm, and the supporting arm is obliquely arranged downwards to form an included angle relative to the buffer connecting arm.