This equipment composed by the chassis, the steam spray gun, seam filling machine and the road maintain safety symbol and so on. It is suitable to the hot melting packing material and the normal temperature packing material。 It mainly uses in the asphalt concrete road surface (also suitable to cement concrete road surface) the irregular crack maintenance. The superiority of constant temperature automatic control system, causes the material to heat up to the hypothesis temperature, it could automatically control heats and enters the heat preservation condition. The unique heats up tube system, ceases the material muzzle fills the seam material condensation question, even if under low temperature condition, it also can guarantee the construction work continuously carries on. Conforms to the human body designed double side material input mouth, reasonable material input highly causes the work to be more relaxed. The electronic system demonstration, is easy to understand, it has convenient advantageous for the operation. The seam filling is reliable, is artistic, effectively lengthened the road surface service life.