FH milk is very sensitive toward mikro charging while temperature and moist air. FH milk that is put at unsulpported hihgt temperature and moist air, it will become hot covering and it will influence decretion of milk production. This research have conducted on July-Agustus 2010 in UPT Ruminansia Besar Dinas Peternakan Kabupaten Kampar. Body temperature, stable temperature, respiration rate and heart rate is as a parameter used as an indicator to FH anviranment adaptation. This research aimed to know the factors that influence FH milk production. This research is done at 8 cows. This research finding indicate lactation I milk production is 2,43±0,50 liter, bod temperature is 37,76±0,530C, stabel temperature is 27,24±1,010C, respiration rate is 32,75±1,03 time per minute and heart rate is 58,871±1,63 time per minute. Lactation II milk production is 2,97±0,07 liter, body temperature is 33,16±5,080C, stabel temperature is 27,24±1,010C, respiration rate is 32,62±1,76 time per minute and heart rate is 58,51±1,06 time per minute. Lactation III milk production is 2,52±0,57liter, body temperature is 37,76±0,500C, stabel temperature is 27,24±1,010C, respiration rate is 31,5±3,54 time per minute and heart rate is 57,75±3,19 time per minute. Doble linier regression, F and T test indicate that body T, stable T, respiration rate and heart rate is not influence toward FH milk production at each lactation stage in UPT Ruminansia Besar Dinas Peternakan Kabupaten Kampar.