Built-in heat preservation filling device of beehive

The invention relates to the technical field of beekeeping, and especially relates to a built-in heat preservation filling apparatus of beehives for facilitating reasonable adjusting survival temperature of bees. The aim of the invention is to solve the problems of difficulties in temperature control for overwintering and spring breeding of bees. The built-in heat preservation filling apparatus comprises an outer filling bag with fully enclosed structure, wherein a telescopic metal framework is arranged inside the outer filling bag and two insulation bags arranged on two sides of the outer filling bag respectively. The insulation bags are filled with insulation material. The telescopic metal framework is a cuboid frame formed by longitudinal metal long tubes, vertical metal long tubes and horizontal metal long tubes, wherein the horizontal metal long tubes are in a structure of telescopic casing pipe. The periphery of the telescopic metal framework is connected to the outer filling bag as a whole by four movable banding ropes and connecting ribbons. The free space of a beehive is filled up with the heat preservation filling apparatus, so that heat dissipation scope and heat propagation are reduced. The built-in heat preservation filling apparatus can be applied to heat preservation for bees with different number of honeycomb. The space is reasonably regulated so that heat preservation effect can be maximized. By use of the built-in heat preservation filling apparatus, physiology and life habit of bees is not influenced. The built-in heat preservation filling apparatus has the advantages of safety, simplicity and quickness.