Mechanical stoker thermal energy compensation arrangement and equipment device's garbage incinerator includes: the base, set up first, second curb plate in the base both sides, the connecting piece isbase and first, second curb plate swing joint, and elastomeric element makes first, second curb plate be elastic displacement for the base, the connecting piece passes through the connecting piece through -hole on the base, the both ends of connecting piece respectively with first curb plate and second curb plate swing joint, elastomeric element passes through the elastomeric element through -hole on the base, elastomeric element's both ends respectively with first curb plate and second curb plate fixed connection. Mechanical stoker thermal energy compensation arrangement sets up in the middle part that the all multi -furnace that arrange according to the preface arranged the piece, and its both sides all are provided with the fire grate segment for first, second curb plate is close to with the fire grate segment on both sides respectively, and it is flexible to be used for absorbing the fire grate segment that fire grate segment expend with heat and contract with cold leads to. Mechanical stoker thermal energy compensation arrangement can absorb fire grate segment expend with heat and contract with cold, has avoided the various operational failure that the fire grate segment metamorphosis arouses.