Abstract: KM is a new kind of forest fire retardant, with advantages of high efficiency, low consumption and ease of operation. Equipment for applying KM forest fire retardants was specifically developed to fit the unique requirements for fire prevention on large areas in the field. The spraying equipment can be used in grassland and grassland outside the forests. Ten nozzles are adapted for adjusted heights and distances between the nozzles. The width of the area covered by spraying of the retardant is two meters, with a maximum carriage of 1 000 kg.