123 pp. (1994). In this thesis the first analysis of multi-jet production with the Hl detector at HERA is presented. The studies are based on data taken in 1992. The integrated luminosity was $22.5 nb^{-1}$. The structure of multi jet events are explored und compared to Monte Carlo models. Jet rates for momentum transfers squared up to $500 GeV^2$ are determind using the JADE clustering algorithm. Sytematical effects are investigated. Within the statistical and systematical errors the jet rates are found to be in agreement with the predictions from QCD based models.
