The utility model provides a fruit vegetables liquid nitrogen precooling apparatus, include from booster -type liquid nitrogen bottle that liquid nitrogen pipe, nitrogen gas pipe, nitrogen gas jet pump and fore -cooling room go out nitrogen gas union coupling to nitrogen gas jet pump left end high -pressure air inflow mouth for from booster -type liquid nitrogen bottle, from booster -type liquid nitrogen bottle go out the liquid nitrogen mouth for the liquid nitrogen union coupling import to the liquid nitrogen on the nitrogen gas jet pump, nitrogen gas jet pump right -hand member exports to be connected with ventilation pipe no. 1 with the fore -cooling room, the fore -cooling room is connected to the induction port of nitrogen gas jet pump lower extreme with ventilation pipe no. 2. The beneficial effect of the utility model: firstly, do not have and to carry out precooling, the regional remote resolute vegetables producing region of specially adapted to the fruit vegetables under the electric power circumstances, secondly, nitrogen gas recycles, improves the utilization ratio of liquid nitrogen.