Owing to the decametric wavelength, large aperture antenna array is needed for high frequency (HF) ground radar to obtain high angular resolution with conventional beam forming (CBF); for the case of compact antenns or smarB aperture array, spatial super-resalution algorithms are used to get safislactory angular resolution. Wuhan University's occan state measurlng and anolyzing radar (OSMAR2000) is expected to real time extract ocean surface current, wave and surface wind at medium-and long-range. To obtain long-range (ie. 2O0km) current mapping, radar frequency must be salaried in the lower region of the HF hand, e.g, 7.5MHz, Digital beam forming (DBF) is applied with the 120m-long phased array to determine the bearings of sea echo with 15 resolution for wave and wind extraction. The angular resolution is, however, too coarse for current mapping, especlally when the ocean current detection range Is as far as 200km. Consequently, a super-resolution ocean surface current algorithm based on multiple signal classification (MUSIC) is developed for OSMAR2000. The relative theorY basis, processing procedure and preprossing and postproessing associated with the algurithm are given in this, paper, The comparison of OSMAR2000 measurements with the measurements from current meter and Ihe Seasonde system shows the ocean surface currenl algorithm based on MUSIC for OSMAP2000 can meet the requiumenta of the project contract successfully.