Abstract: In view of problem that it is difficult to measure impact frequency of pneumatic anchor drill, the paper proposed a design scheme of new type of measuring instrument of impact frequency of pneumatic anchor drill. The instrument uses pressure sensor to collect impact signal of drill, and uses voltage comparator and monostable trigger to process the signal which is input into single-chip microcomputer to count impact frequency of drill. The actual application showed that the instrument can measure impact frequency of drill accurately and easily.