The invention aims to provide a double-wall corrugated pipe die head deflected wall adjustment device and a deflected wall adjustment method. The double-wall corrugated pipe die head deflected wall adjustment device comprises: a head stock, a die head assembly, an inner deflected wall adjustment apparatus and an outer deflected wall adjustment apparatus. The die head assembly consists of: an innercore that is equipped with a mesopore and has the rear end connected to the head stock, and an inner sleeve and an outer sleeve that are sleeved outside the inner core in order and have the rear endsdetachably connected to the head stock respectively. An inner wall material stock channel is formed between the inner core and the inner sleeve, and an outer wall material stock channel is formed between the inner sleeve and the outer sleeve. The double-wall corrugated pipe die head deflected wall adjustment device has the characteristics of convenient and fast deflected wall adjustment.