The invention discloses a heat dissipation device with three-dimensional pulsation heat pipes. The heat dissipation device comprises an
evaporation unit, a condensation unit, and a heat insulation unit, wherein a plurality of
evaporation pulsation heat pipes and a plurality of condensation pulsation heat pipes are arranged in a plane; one end of each
evaporation pulsation
heat pipe communicates with one end of the corresponding condensation pulsation
heat pipe through a first
elbow, and the other end of each evaporation pulsation
heat pipe communicates with the other end of the corresponding condensation pulsation heat
pipe through a second
elbow; and the plurality of evaporation pulsation heat pipes communicate with the plurality of condensation pulsation heat pipes through the pluralityof first elbows and the plurality of second elbows to form a closed-loop passage. According to the heat dissipation device with the three-dimensional pulsation heat pipes, on the basis of existing two-dimensional heat pipes, an evaporation section and a condensation section are arranged on two parallel planes which are parallel to each other, the evaporation section and the condensation section are connected through the elbows to form the
closed loop, and the burning-dry phenomenon caused by excessive quantity of the elbows of a traditional heat
pipe evaporation section is avoided; and a flat-plate structure can be well connected with a heat source, unnecessary
heat resistance is avoided, and heat exchange performance is improved.