LDJ400 series multi-functional roadheader is a special equipment used in tunnel non-blast excavation, mainly using the high-frequency hammer or crushing hammer of the working part to impact the rock breaking, bucket teeth or drill rod wedge into the rock and the use of the free surface gravity action below the surrounding rock to automatically break the rock (the high-frequency hammer is mainly for the rock below 40MPa; the rock with higher hardness and poor development adopts the crushing hammer construction). Using local control + wireless remote control mode, can adapt to 6 ~ 9.5 meters tunnel excavation, set high-frequency rock breaking, soft soil fast excavation, contour trimming, spray dust removal and other functions in one, suitable for restricting the construction of blasting sections (such as airports, residential areas and wildlife sanctuaries, etc.), strong adaptability, meet the construction of multiple types of surrounding rock, reduce the occurrence of over-under-excavation, landslides, etc