The invention belongs to the technical field of bioengineering, and particularly relates to an aspergillus niger strain capable of producing pectinase at high yield and an application thereof. The aspergillus niger LD-092 disclosed by the invention is obtained by carrying out Co60 ray mutagenesis treatment on an aspergillus niger original strain AJ213, and a preservation number of the strain is CGMCC No. 18559. The enzyme activity of pectinase produced by fermenting aspergillus niger LD-092 reaches 80000 to 85000U/mL; an optimum pH range of the pectinase obtained by fermentation is 2.5 to 4.0;the optimal action temperature range is 30-50 DEG C, the pectinase has remarkable acid resistance, keeps the enzyme activity at 85% or above after being stored for 36 hours under the pH value of 3.0-4.0, and can be widely applied to industrial production, the industrial application range of pectinase can be remarkably expanded, so that the application value of pectinase is increased.