Wide-field subcutaneous dilator

The invention relates to a wide-field subcutaneous dilator, which comprises a bottom plate, an inner pipe and an outer pipe fixedly arranged on the bottom plate, a sliding groove arranged between the inner pipe and the outer pipe, a first fixing piece and a second fixing piece which are connected with the outer pipe integrally, an expansion pipe is arranged in the sliding groove and capable of sliding up and down, a first connecting plate and a second connecting plate are respectively arranged on two sides of the bottom of a expansion tube, a first distraction piece and a second distraction piece are respectively fixed on the first connecting plate and the second connecting plate; the top surface of the bottom plate is provided with an inserting groove used for clamping the expansion pipe, and the two sides of the bottom of the expansion pipe are connected with the first connecting plate and the second connecting plate in a slope type tangent structure respectively. 本发明涉及一种广视野皮下扩张器，包括底板、固定设置在底板上的内管和外管、设置在外管和内