NOVELTY - A circulatory grafting method for speeding up municipal sludge dry fermentation process comprises fermenting a first batch of material; grafting outer particular sludge; using material from the former batch of hydrolysis stage, acidification stage and vaporization stage to carry out hydrolysis grafting, acidification stage grafting and vaporization stage for the last batch of material; carrying on fermentation process for each batch of material after each grafting until the material is output.    USE - A circulatory grafting method for speeding up municipal sludge dry fermentation process.    ADVANTAGE - The method can efficiently shorten each stage of transitional time, promote the fermentation process and enhance the ecological function of the dry fermentation microorganism and the reclamation process of the municipal sludge and obviously save the equipment investment and the space occupation.    DETAILED DESCRIPTION - A circulatory grafting method for speeding up municipal sludge dry fermentation process comprises:    (A) putting the first batch of initial raw material, the de-watered sludge into a reactor; carrying out solid-liquid separation for the anaerobic particular sludge; putting aside to remove the liquid supernatant or filtering; adding the anaerobic particular sludge into the de-watered sludge for grafting; sealing the material inlet; starting the screw strip mixing motor; adjusting the rotating speed at 5-15 revolutions/minute (rpm); setting the starting stage at 2-3 days; culturing the domesticated anaerobic particular sludge; mixing and producing the heat to rise the temperature of the material above 30 degrees C, where the addition amount of the anaerobic particular sludge is 1/5-1/3 of the volume of the de-watered sludge;    (B) controlling the rotating speed of the spiral mixing motor at 10-20 rpm during the first batch of hydrolysis stage; setting the mixing time of the mixing motor more than 12 hours, where after 3-4 days, the water content of the material rise by 1-3%; the material adhesive power drops to 10-15 g; enriching the hydrolysis fermentation germs in the material; adding the first batch of the hydrolysis material into the de-watered sludge of the second batch of the initial material for the grafting; after mixing, putting the second batch to the starting stage and the hydrolysis stage; putting the first batch of remaining material from the last stage of the hydrolysis stage into the acidification stage, where the addition amount of the first batch of hydrolysis material is 1/4-1/3 of the volume of the de-watered sludge of the second batch of the initial material;    (C) keeping the rotating speed of the spiral mixing motor of the first batch of acidification stage; setting that the mixing motor to work at interval to make the machine to mix for 8-16 hours each day; opening the temperature control device; keeping the temperature of the material at 35 plus minus 1 degrees C; acidifying for 4-7 days; adding the second batch of hydrolysis material to the third batch of initial material de-watered sludge after the second batch of material is hydrolyzed for 3-4 days, the addition amount of the second batch of hydrolyzed material being 1/4-1/3 of the volume of the third batch of initial material de-watered sludge; adding the first batch of the initial material of the acidification stage to the second batch for grafting material of the acid production stage when the second batch of material comes into the last period of the hydrolysis stage to make it come into the acidification stage; making the first batch of remaining material come into the vaporization stage, where the addition amount of the initial material coming into the initial period of the acidification stage being 1/4-1/3 of the volume of the second batch of the material coming into the acid production stage;    (D) continuously controlling the temperature at 35 plus minus 1 degrees C at the first batch of material vaporization stage; adjusting the rotating speed of the spiral mixing motor for 20-40 rpm; setting the mixing motor to work at intervals; setting the mixing time of the mixing motor for 8-16 hours in each time; adding the turn-on/off frequency of the mixing motor so that it is good for the diffusion of the intermediate material and the overflow of the gas production; controlling the pH value of the material at the vaporization stage; grafting to start the fourth batch of material after the third batch of material is hydrolyzed for 3-4 days; using the second batch of material at the acidification production stage for the grafting at the last period of the hydrolysis of the second batch through the same specific method; taking the vaporization stage for the grafting; controlling the fermentation according to the mixing parameter of the methane production stage and adjusting the pH to 6.6-7.5; carrying on the fermentation process of the original batch of the remaining material; and    (E) discharging the swamp after the fermentation of the first batch of material is finished; ending the fermentation of this batch; circulating the other batch of material according to the fermentation process; and grafting the next batch of material at suitable time.