The invention discloses a combination method based on evidence under a new evidence judgment standard. Through the method, the problems that in the prior art, evidence allocation is unreasonable, anda combination result goes against an actual result are solved. The method comprises the steps that 1, sensors are deployed, wherein sensor groups composed of multiple types of sensors are installed atcorners of a room, and the multiple types of sensors include temperature sensors, humidity sensors, smoke concentration sensors, carbon dioxide concentration sensors and infrared sensors; 2, a new evidence conflict judgment standard Pcor is confirmed, wherein evidence is determined according to data collected by the sensors, and the conflict degree among all the evidence is analyzed according tothe evidence; 3, weight coefficients of all the evidence are determined, wherein a support matrix is constructed according to conflict judgment standard Pcor values of all the evidence, trust degreesare confirmed according to the support matrix, and finally the trust degrees are used to confirm the weight coefficients of all the evidence; and 4, the evidence is combined, wherein basic probabilityassignment vectors are adjusted according to the weight coefficients, and combination is performed according to the DS evidence theory to obtain a more reasonable conclusion.