The invention discloses an isolation-strip forming and fire extinguishing truck for forest. The isolation-strip forming and fire extinguishing truck for forest comprises a truck body; the truck body comprises a control chamber, a remote controller, a power device, a front rotary cutting mechanism and a back rotary overturning mechanism; the front rotary cutting mechanism is mounted at the front end of the truck body through a front bracket; the back rotary overturning mechanism is mounted at the back end of the truck body through a back bracket; the front rotary cutting mechanism comprises a rotating cutter wheel; the rotating cutter wheel is fixedly connected to a first transmission shaft; the first transmission shaft is rotationally connected to two ends of the front bracket; the back rotary overturning mechanism comprises a rotary tiller; the rotary tiller is fixedly connected with a second transmission shaft; the second transmission shaft is rotationally connected to two ends of the back bracket; and the first transmission shaft and the second transmission shaft are both connected with the power device. The isolation-strip forming and fire extinguishing truck for forest disclosed by the embodiments of the invention solves the problems of low isolation-strip forming efficiency, high danger coefficient and incapability of entering fire scenes by fire extinguishing trucks dueto manual formation of isolation strips in the prior art.