For 0 < p < 1, Haberl and Ludwig defined the notions of symmetric and asymmetric L p -intersection bodies. Recently, Wang and Li introduced the general L p -intersection bodies. In this paper, we give the L p -dual geominimal surface area forms for the extremum values and Brunn-Minkowski type inequality of general L p -intersection bodies. Further, combining with the L p -dual geominimal surface areas, we consider Busemann-Petty type problem for general L p -intersection bodies.