Automobile data recorder convenient to disassemble

The invention discloses an automobile data recorder convenient to disassemble, which comprises a box body, wherein a heat dissipation cavity with a downward opening is formed in the box body, a heat dissipation device is arranged in the heat dissipation cavity, the heat dissipation device comprises a sound box cavity arranged in the heat dissipation cavity in a communicating mode, a sound box is arranged in the center of the left end wall of the sound box cavity, clamping plates arranged on the outer circumferential surface of the sound box in a sleeving mode are arranged in the sound box cavity in a bilateral symmetry mode, a transmission cavity is formed in the upper side of the heat dissipation cavity, a heat dissipation shaft extending into the transmission cavity is rotationally arranged in the center of the upper end wall of the heat dissipation cavity, and heat dissipation blades are fixedly arranged at the lower end of the heat dissipation shaft in a circumferential array withthe heat dissipation shaf