The invention discloses a 22SiMn2B steel plate for a construction machine and a production method of the 22SiMn2B steel plate. The steel plate comprises, by mass percentages, 0.19-0.25% of C, 0.70-1.00% of Si, 1.50-1.85% of Mn, not larger than 0.025% of P, 0.010-0.060% of Ti, 0.0005-0.035% of B and the balance Fe and inevitable impurities. The production method comprise the steps of steel making,continuous casting, heating and rolling processes; and an II-type rolling control process is adopted for the rolling process. By the adoption of the method, the Brinell hardness of the surface of thesteel plate produced by the method is less than or equal to 230 HB and the surface roughness is less than or equal to 5 mm/1 m. The produced steel plate has the beneficial effects of being pure in steel quality, high in density and stable in quality, and the performance of the steel plate meets the requirements. The steel plate produced by the method is low in production cost, and mass productioncan be achieved.