The invention relates to a lead paste for battery starting / stopping, and a preparation method thereof. The lead paste is composed of a positive lead paste and a negative lead paste, and the positive lead paste comprises, by weight, 990-1010 parts of lead
powder, 40-60 parts of red lead, 0.6-1.0 part of a conductive
fiber, 2.5-3.5 parts of
graphite, 1.5-2.5 parts of diantimony
trioxide, 0.5-1.5 parts of
stannous sulfate, 110-130 parts of water and 80-90 parts of
sulfuric acid; and the negative lead paste comprises, by weight, 990-1010 parts of the lead
powder, 0.4-0.8 parts of the conductive
fiber, 2.5-3.5 parts of
acetylene black, 8-12 parts of
barium sulfate, 0.5-1.5 parts of
humic acid, 1.5 -2.5 parts of
lignin, 100-120 parts of water, 85-95 parts of
sulfuric acid. The lead paste for battery starting / stopping and the preparation method thereof effectively solve the problems of poor battery performance, low
electrode plate strength, easy loosening and
softening, and short battery life.