  A new approach to composite superconformal strings is considered . This
composite string model has two scales: first one (~1 Gev) is for edging
surfaces and second one (Planck scale) is for ridge surfaces . Nonlinear
realization of two-dimensional superconformal symmetry on edging surfaces leads
to superconvergence of one-loop planar diagrams. Some features of hadron
amplitudes and of hadron spectrum are discussed. Spectrum of closed strings and
a possibility of unified theory of fundamental interactions on the basis of
this model are considered.
